I am done

rl/Lib/site-packages/mpl_toolkits/axes_grid1/__init__.py

@@ -0,0 +1,10 @@
+from . import axes_size as Size
+from .axes_divider import Divider, SubplotDivider, make_axes_locatable
+from .axes_grid import AxesGrid, Grid, ImageGrid
+
+from .parasite_axes import host_subplot, host_axes
+
+__all__ = ["Size",
+           "Divider", "SubplotDivider", "make_axes_locatable",
+           "AxesGrid", "Grid", "ImageGrid",
+           "host_subplot", "host_axes"]

rl/Lib/site-packages/mpl_toolkits/axes_grid1/anchored_artists.py

@@ -0,0 +1,462 @@
+from matplotlib import _api, transforms
+from matplotlib.offsetbox import (AnchoredOffsetbox, AuxTransformBox,
+                                  DrawingArea, TextArea, VPacker)
+from matplotlib.patches import (Rectangle, Ellipse, ArrowStyle,
+                                FancyArrowPatch, PathPatch)
+from matplotlib.text import TextPath
+
+__all__ = ['AnchoredDrawingArea', 'AnchoredAuxTransformBox',
+           'AnchoredEllipse', 'AnchoredSizeBar', 'AnchoredDirectionArrows']
+
+
+class AnchoredDrawingArea(AnchoredOffsetbox):
+    def __init__(self, width, height, xdescent, ydescent,
+                 loc, pad=0.4, borderpad=0.5, prop=None, frameon=True,
+                 **kwargs):
+        """
+        An anchored container with a fixed size and fillable `.DrawingArea`.
+
+        Artists added to the *drawing_area* will have their coordinates
+        interpreted as pixels. Any transformations set on the artists will be
+        overridden.
+
+        Parameters
+        ----------
+        width, height : float
+            Width and height of the container, in pixels.
+        xdescent, ydescent : float
+            Descent of the container in the x- and y- direction, in pixels.
+        loc : str
+            Location of this artist.  Valid locations are
+            'upper left', 'upper center', 'upper right',
+            'center left', 'center', 'center right',
+            'lower left', 'lower center', 'lower right'.
+            For backward compatibility, numeric values are accepted as well.
+            See the parameter *loc* of `.Legend` for details.
+        pad : float, default: 0.4
+            Padding around the child objects, in fraction of the font size.
+        borderpad : float, default: 0.5
+            Border padding, in fraction of the font size.
+        prop : `~matplotlib.font_manager.FontProperties`, optional
+            Font property used as a reference for paddings.
+        frameon : bool, default: True
+            If True, draw a box around this artist.
+        **kwargs
+            Keyword arguments forwarded to `.AnchoredOffsetbox`.
+
+        Attributes
+        ----------
+        drawing_area : `~matplotlib.offsetbox.DrawingArea`
+            A container for artists to display.
+
+        Examples
+        --------
+        To display blue and red circles of different sizes in the upper right
+        of an Axes *ax*:
+
+        >>> ada = AnchoredDrawingArea(20, 20, 0, 0,
+        ...                           loc='upper right', frameon=False)
+        >>> ada.drawing_area.add_artist(Circle((10, 10), 10, fc="b"))
+        >>> ada.drawing_area.add_artist(Circle((30, 10), 5, fc="r"))
+        >>> ax.add_artist(ada)
+        """
+        self.da = DrawingArea(width, height, xdescent, ydescent)
+        self.drawing_area = self.da
+
+        super().__init__(
+            loc, pad=pad, borderpad=borderpad, child=self.da, prop=None,
+            frameon=frameon, **kwargs
+        )
+
+
+class AnchoredAuxTransformBox(AnchoredOffsetbox):
+    def __init__(self, transform, loc,
+                 pad=0.4, borderpad=0.5, prop=None, frameon=True, **kwargs):
+        """
+        An anchored container with transformed coordinates.
+
+        Artists added to the *drawing_area* are scaled according to the
+        coordinates of the transformation used. The dimensions of this artist
+        will scale to contain the artists added.
+
+        Parameters
+        ----------
+        transform : `~matplotlib.transforms.Transform`
+            The transformation object for the coordinate system in use, i.e.,
+            :attr:`matplotlib.axes.Axes.transData`.
+        loc : str
+            Location of this artist.  Valid locations are
+            'upper left', 'upper center', 'upper right',
+            'center left', 'center', 'center right',
+            'lower left', 'lower center', 'lower right'.
+            For backward compatibility, numeric values are accepted as well.
+            See the parameter *loc* of `.Legend` for details.
+        pad : float, default: 0.4
+            Padding around the child objects, in fraction of the font size.
+        borderpad : float, default: 0.5
+            Border padding, in fraction of the font size.
+        prop : `~matplotlib.font_manager.FontProperties`, optional
+            Font property used as a reference for paddings.
+        frameon : bool, default: True
+            If True, draw a box around this artist.
+        **kwargs
+            Keyword arguments forwarded to `.AnchoredOffsetbox`.
+
+        Attributes
+        ----------
+        drawing_area : `~matplotlib.offsetbox.AuxTransformBox`
+            A container for artists to display.
+
+        Examples
+        --------
+        To display an ellipse in the upper left, with a width of 0.1 and
+        height of 0.4 in data coordinates:
+
+        >>> box = AnchoredAuxTransformBox(ax.transData, loc='upper left')
+        >>> el = Ellipse((0, 0), width=0.1, height=0.4, angle=30)
+        >>> box.drawing_area.add_artist(el)
+        >>> ax.add_artist(box)
+        """
+        self.drawing_area = AuxTransformBox(transform)
+
+        super().__init__(loc, pad=pad, borderpad=borderpad,
+                         child=self.drawing_area, prop=prop, frameon=frameon,
+                         **kwargs)
+
+
+@_api.deprecated("3.8")
+class AnchoredEllipse(AnchoredOffsetbox):
+    def __init__(self, transform, width, height, angle, loc,
+                 pad=0.1, borderpad=0.1, prop=None, frameon=True, **kwargs):
+        """
+        Draw an anchored ellipse of a given size.
+
+        Parameters
+        ----------
+        transform : `~matplotlib.transforms.Transform`
+            The transformation object for the coordinate system in use, i.e.,
+            :attr:`matplotlib.axes.Axes.transData`.
+        width, height : float
+            Width and height of the ellipse, given in coordinates of
+            *transform*.
+        angle : float
+            Rotation of the ellipse, in degrees, anti-clockwise.
+        loc : str
+            Location of the ellipse.  Valid locations are
+            'upper left', 'upper center', 'upper right',
+            'center left', 'center', 'center right',
+            'lower left', 'lower center', 'lower right'.
+            For backward compatibility, numeric values are accepted as well.
+            See the parameter *loc* of `.Legend` for details.
+        pad : float, default: 0.1
+            Padding around the ellipse, in fraction of the font size.
+        borderpad : float, default: 0.1
+            Border padding, in fraction of the font size.
+        frameon : bool, default: True
+            If True, draw a box around the ellipse.
+        prop : `~matplotlib.font_manager.FontProperties`, optional
+            Font property used as a reference for paddings.
+        **kwargs
+            Keyword arguments forwarded to `.AnchoredOffsetbox`.
+
+        Attributes
+        ----------
+        ellipse : `~matplotlib.patches.Ellipse`
+            Ellipse patch drawn.
+        """
+        self._box = AuxTransformBox(transform)
+        self.ellipse = Ellipse((0, 0), width, height, angle=angle)
+        self._box.add_artist(self.ellipse)
+
+        super().__init__(loc, pad=pad, borderpad=borderpad, child=self._box,
+                         prop=prop, frameon=frameon, **kwargs)
+
+
+class AnchoredSizeBar(AnchoredOffsetbox):
+    def __init__(self, transform, size, label, loc,
+                 pad=0.1, borderpad=0.1, sep=2,
+                 frameon=True, size_vertical=0, color='black',
+                 label_top=False, fontproperties=None, fill_bar=None,
+                 **kwargs):
+        """
+        Draw a horizontal scale bar with a center-aligned label underneath.
+
+        Parameters
+        ----------
+        transform : `~matplotlib.transforms.Transform`
+            The transformation object for the coordinate system in use, i.e.,
+            :attr:`matplotlib.axes.Axes.transData`.
+        size : float
+            Horizontal length of the size bar, given in coordinates of
+            *transform*.
+        label : str
+            Label to display.
+        loc : str
+            Location of the size bar.  Valid locations are
+            'upper left', 'upper center', 'upper right',
+            'center left', 'center', 'center right',
+            'lower left', 'lower center', 'lower right'.
+            For backward compatibility, numeric values are accepted as well.
+            See the parameter *loc* of `.Legend` for details.
+        pad : float, default: 0.1
+            Padding around the label and size bar, in fraction of the font
+            size.
+        borderpad : float, default: 0.1
+            Border padding, in fraction of the font size.
+        sep : float, default: 2
+            Separation between the label and the size bar, in points.
+        frameon : bool, default: True
+            If True, draw a box around the horizontal bar and label.
+        size_vertical : float, default: 0
+            Vertical length of the size bar, given in coordinates of
+            *transform*.
+        color : str, default: 'black'
+            Color for the size bar and label.
+        label_top : bool, default: False
+            If True, the label will be over the size bar.
+        fontproperties : `~matplotlib.font_manager.FontProperties`, optional
+            Font properties for the label text.
+        fill_bar : bool, optional
+            If True and if *size_vertical* is nonzero, the size bar will
+            be filled in with the color specified by the size bar.
+            Defaults to True if *size_vertical* is greater than
+            zero and False otherwise.
+        **kwargs
+            Keyword arguments forwarded to `.AnchoredOffsetbox`.
+
+        Attributes
+        ----------
+        size_bar : `~matplotlib.offsetbox.AuxTransformBox`
+            Container for the size bar.
+        txt_label : `~matplotlib.offsetbox.TextArea`
+            Container for the label of the size bar.
+
+        Notes
+        -----
+        If *prop* is passed as a keyword argument, but *fontproperties* is
+        not, then *prop* is assumed to be the intended *fontproperties*.
+        Using both *prop* and *fontproperties* is not supported.
+
+        Examples
+        --------
+        >>> import matplotlib.pyplot as plt
+        >>> import numpy as np
+        >>> from mpl_toolkits.axes_grid1.anchored_artists import (
+        ...     AnchoredSizeBar)
+        >>> fig, ax = plt.subplots()
+        >>> ax.imshow(np.random.random((10, 10)))
+        >>> bar = AnchoredSizeBar(ax.transData, 3, '3 data units', 4)
+        >>> ax.add_artist(bar)
+        >>> fig.show()
+
+        Using all the optional parameters
+
+        >>> import matplotlib.font_manager as fm
+        >>> fontprops = fm.FontProperties(size=14, family='monospace')
+        >>> bar = AnchoredSizeBar(ax.transData, 3, '3 units', 4, pad=0.5,
+        ...                       sep=5, borderpad=0.5, frameon=False,
+        ...                       size_vertical=0.5, color='white',
+        ...                       fontproperties=fontprops)
+        """
+        if fill_bar is None:
+            fill_bar = size_vertical > 0
+
+        self.size_bar = AuxTransformBox(transform)
+        self.size_bar.add_artist(Rectangle((0, 0), size, size_vertical,
+                                           fill=fill_bar, facecolor=color,
+                                           edgecolor=color))
+
+        if fontproperties is None and 'prop' in kwargs:
+            fontproperties = kwargs.pop('prop')
+
+        if fontproperties is None:
+            textprops = {'color': color}
+        else:
+            textprops = {'color': color, 'fontproperties': fontproperties}
+
+        self.txt_label = TextArea(label, textprops=textprops)
+
+        if label_top:
+            _box_children = [self.txt_label, self.size_bar]
+        else:
+            _box_children = [self.size_bar, self.txt_label]
+
+        self._box = VPacker(children=_box_children,
+                            align="center",
+                            pad=0, sep=sep)
+
+        super().__init__(loc, pad=pad, borderpad=borderpad, child=self._box,
+                         prop=fontproperties, frameon=frameon, **kwargs)
+
+
+class AnchoredDirectionArrows(AnchoredOffsetbox):
+    def __init__(self, transform, label_x, label_y, length=0.15,
+                 fontsize=0.08, loc='upper left', angle=0, aspect_ratio=1,
+                 pad=0.4, borderpad=0.4, frameon=False, color='w', alpha=1,
+                 sep_x=0.01, sep_y=0, fontproperties=None, back_length=0.15,
+                 head_width=10, head_length=15, tail_width=2,
+                 text_props=None, arrow_props=None,
+                 **kwargs):
+        """
+        Draw two perpendicular arrows to indicate directions.
+
+        Parameters
+        ----------
+        transform : `~matplotlib.transforms.Transform`
+            The transformation object for the coordinate system in use, i.e.,
+            :attr:`matplotlib.axes.Axes.transAxes`.
+        label_x, label_y : str
+            Label text for the x and y arrows
+        length : float, default: 0.15
+            Length of the arrow, given in coordinates of *transform*.
+        fontsize : float, default: 0.08
+            Size of label strings, given in coordinates of *transform*.
+        loc : str, default: 'upper left'
+            Location of the arrow.  Valid locations are
+            'upper left', 'upper center', 'upper right',
+            'center left', 'center', 'center right',
+            'lower left', 'lower center', 'lower right'.
+            For backward compatibility, numeric values are accepted as well.
+            See the parameter *loc* of `.Legend` for details.
+        angle : float, default: 0
+            The angle of the arrows in degrees.
+        aspect_ratio : float, default: 1
+            The ratio of the length of arrow_x and arrow_y.
+            Negative numbers can be used to change the direction.
+        pad : float, default: 0.4
+            Padding around the labels and arrows, in fraction of the font size.
+        borderpad : float, default: 0.4
+            Border padding, in fraction of the font size.
+        frameon : bool, default: False
+            If True, draw a box around the arrows and labels.
+        color : str, default: 'white'
+            Color for the arrows and labels.
+        alpha : float, default: 1
+            Alpha values of the arrows and labels
+        sep_x, sep_y : float, default: 0.01 and 0 respectively
+            Separation between the arrows and labels in coordinates of
+            *transform*.
+        fontproperties : `~matplotlib.font_manager.FontProperties`, optional
+            Font properties for the label text.
+        back_length : float, default: 0.15
+            Fraction of the arrow behind the arrow crossing.
+        head_width : float, default: 10
+            Width of arrow head, sent to `.ArrowStyle`.
+        head_length : float, default: 15
+            Length of arrow head, sent to `.ArrowStyle`.
+        tail_width : float, default: 2
+            Width of arrow tail, sent to `.ArrowStyle`.
+        text_props, arrow_props : dict
+            Properties of the text and arrows, passed to `.TextPath` and
+            `.FancyArrowPatch`.
+        **kwargs
+            Keyword arguments forwarded to `.AnchoredOffsetbox`.
+
+        Attributes
+        ----------
+        arrow_x, arrow_y : `~matplotlib.patches.FancyArrowPatch`
+            Arrow x and y
+        text_path_x, text_path_y : `~matplotlib.text.TextPath`
+            Path for arrow labels
+        p_x, p_y : `~matplotlib.patches.PathPatch`
+            Patch for arrow labels
+        box : `~matplotlib.offsetbox.AuxTransformBox`
+            Container for the arrows and labels.
+
+        Notes
+        -----
+        If *prop* is passed as a keyword argument, but *fontproperties* is
+        not, then *prop* is assumed to be the intended *fontproperties*.
+        Using both *prop* and *fontproperties* is not supported.
+
+        Examples
+        --------
+        >>> import matplotlib.pyplot as plt
+        >>> import numpy as np
+        >>> from mpl_toolkits.axes_grid1.anchored_artists import (
+        ...     AnchoredDirectionArrows)
+        >>> fig, ax = plt.subplots()
+        >>> ax.imshow(np.random.random((10, 10)))
+        >>> arrows = AnchoredDirectionArrows(ax.transAxes, '111', '110')
+        >>> ax.add_artist(arrows)
+        >>> fig.show()
+
+        Using several of the optional parameters, creating downward pointing
+        arrow and high contrast text labels.
+
+        >>> import matplotlib.font_manager as fm
+        >>> fontprops = fm.FontProperties(family='monospace')
+        >>> arrows = AnchoredDirectionArrows(ax.transAxes, 'East', 'South',
+        ...                                  loc='lower left', color='k',
+        ...                                  aspect_ratio=-1, sep_x=0.02,
+        ...                                  sep_y=-0.01,
+        ...                                  text_props={'ec':'w', 'fc':'k'},
+        ...                                  fontproperties=fontprops)
+        """
+        if arrow_props is None:
+            arrow_props = {}
+
+        if text_props is None:
+            text_props = {}
+
+        arrowstyle = ArrowStyle("Simple",
+                                head_width=head_width,
+                                head_length=head_length,
+                                tail_width=tail_width)
+
+        if fontproperties is None and 'prop' in kwargs:
+            fontproperties = kwargs.pop('prop')
+
+        if 'color' not in arrow_props:
+            arrow_props['color'] = color
+
+        if 'alpha' not in arrow_props:
+            arrow_props['alpha'] = alpha
+
+        if 'color' not in text_props:
+            text_props['color'] = color
+
+        if 'alpha' not in text_props:
+            text_props['alpha'] = alpha
+
+        t_start = transform
+        t_end = t_start + transforms.Affine2D().rotate_deg(angle)
+
+        self.box = AuxTransformBox(t_end)
+
+        length_x = length
+        length_y = length*aspect_ratio
+
+        self.arrow_x = FancyArrowPatch(
+                (0, back_length*length_y),
+                (length_x, back_length*length_y),
+                arrowstyle=arrowstyle,
+                shrinkA=0.0,
+                shrinkB=0.0,
+                **arrow_props)
+
+        self.arrow_y = FancyArrowPatch(
+                (back_length*length_x, 0),
+                (back_length*length_x, length_y),
+                arrowstyle=arrowstyle,
+                shrinkA=0.0,
+                shrinkB=0.0,
+                **arrow_props)
+
+        self.box.add_artist(self.arrow_x)
+        self.box.add_artist(self.arrow_y)
+
+        text_path_x = TextPath((
+            length_x+sep_x, back_length*length_y+sep_y), label_x,
+            size=fontsize, prop=fontproperties)
+        self.p_x = PathPatch(text_path_x, transform=t_start, **text_props)
+        self.box.add_artist(self.p_x)
+
+        text_path_y = TextPath((
+            length_x*back_length+sep_x, length_y*(1-back_length)+sep_y),
+            label_y, size=fontsize, prop=fontproperties)
+        self.p_y = PathPatch(text_path_y, **text_props)
+        self.box.add_artist(self.p_y)
+
+        super().__init__(loc, pad=pad, borderpad=borderpad, child=self.box,
+                         frameon=frameon, **kwargs)

rl/Lib/site-packages/mpl_toolkits/axes_grid1/axes_divider.py

@@ -0,0 +1,694 @@
+"""
+Helper classes to adjust the positions of multiple axes at drawing time.
+"""
+
+import functools
+
+import numpy as np
+
+import matplotlib as mpl
+from matplotlib import _api
+from matplotlib.gridspec import SubplotSpec
+import matplotlib.transforms as mtransforms
+from . import axes_size as Size
+
+
+class Divider:
+    """
+    An Axes positioning class.
+
+    The divider is initialized with lists of horizontal and vertical sizes
+    (:mod:`mpl_toolkits.axes_grid1.axes_size`) based on which a given
+    rectangular area will be divided.
+
+    The `new_locator` method then creates a callable object
+    that can be used as the *axes_locator* of the axes.
+    """
+
+    def __init__(self, fig, pos, horizontal, vertical,
+                 aspect=None, anchor="C"):
+        """
+        Parameters
+        ----------
+        fig : Figure
+        pos : tuple of 4 floats
+            Position of the rectangle that will be divided.
+        horizontal : list of :mod:`~mpl_toolkits.axes_grid1.axes_size`
+            Sizes for horizontal division.
+        vertical : list of :mod:`~mpl_toolkits.axes_grid1.axes_size`
+            Sizes for vertical division.
+        aspect : bool, optional
+            Whether overall rectangular area is reduced so that the relative
+            part of the horizontal and vertical scales have the same scale.
+        anchor : (float, float) or {'C', 'SW', 'S', 'SE', 'E', 'NE', 'N', \
+'NW', 'W'}, default: 'C'
+            Placement of the reduced rectangle, when *aspect* is True.
+        """
+
+        self._fig = fig
+        self._pos = pos
+        self._horizontal = horizontal
+        self._vertical = vertical
+        self._anchor = anchor
+        self.set_anchor(anchor)
+        self._aspect = aspect
+        self._xrefindex = 0
+        self._yrefindex = 0
+        self._locator = None
+
+    def get_horizontal_sizes(self, renderer):
+        return np.array([s.get_size(renderer) for s in self.get_horizontal()])
+
+    def get_vertical_sizes(self, renderer):
+        return np.array([s.get_size(renderer) for s in self.get_vertical()])
+
+    def set_position(self, pos):
+        """
+        Set the position of the rectangle.
+
+        Parameters
+        ----------
+        pos : tuple of 4 floats
+            position of the rectangle that will be divided
+        """
+        self._pos = pos
+
+    def get_position(self):
+        """Return the position of the rectangle."""
+        return self._pos
+
+    def set_anchor(self, anchor):
+        """
+        Parameters
+        ----------
+        anchor : (float, float) or {'C', 'SW', 'S', 'SE', 'E', 'NE', 'N', \
+'NW', 'W'}
+            Either an (*x*, *y*) pair of relative coordinates (0 is left or
+            bottom, 1 is right or top), 'C' (center), or a cardinal direction
+            ('SW', southwest, is bottom left, etc.).
+
+        See Also
+        --------
+        .Axes.set_anchor
+        """
+        if isinstance(anchor, str):
+            _api.check_in_list(mtransforms.Bbox.coefs, anchor=anchor)
+        elif not isinstance(anchor, (tuple, list)) or len(anchor) != 2:
+            raise TypeError("anchor must be str or 2-tuple")
+        self._anchor = anchor
+
+    def get_anchor(self):
+        """Return the anchor."""
+        return self._anchor
+
+    def get_subplotspec(self):
+        return None
+
+    def set_horizontal(self, h):
+        """
+        Parameters
+        ----------
+        h : list of :mod:`~mpl_toolkits.axes_grid1.axes_size`
+            sizes for horizontal division
+        """
+        self._horizontal = h
+
+    def get_horizontal(self):
+        """Return horizontal sizes."""
+        return self._horizontal
+
+    def set_vertical(self, v):
+        """
+        Parameters
+        ----------
+        v : list of :mod:`~mpl_toolkits.axes_grid1.axes_size`
+            sizes for vertical division
+        """
+        self._vertical = v
+
+    def get_vertical(self):
+        """Return vertical sizes."""
+        return self._vertical
+
+    def set_aspect(self, aspect=False):
+        """
+        Parameters
+        ----------
+        aspect : bool
+        """
+        self._aspect = aspect
+
+    def get_aspect(self):
+        """Return aspect."""
+        return self._aspect
+
+    def set_locator(self, _locator):
+        self._locator = _locator
+
+    def get_locator(self):
+        return self._locator
+
+    def get_position_runtime(self, ax, renderer):
+        if self._locator is None:
+            return self.get_position()
+        else:
+            return self._locator(ax, renderer).bounds
+
+    @staticmethod
+    def _calc_k(sizes, total):
+        # sizes is a (n, 2) array of (rel_size, abs_size); this method finds
+        # the k factor such that sum(rel_size * k + abs_size) == total.
+        rel_sum, abs_sum = sizes.sum(0)
+        return (total - abs_sum) / rel_sum if rel_sum else 0
+
+    @staticmethod
+    def _calc_offsets(sizes, k):
+        # Apply k factors to (n, 2) sizes array of (rel_size, abs_size); return
+        # the resulting cumulative offset positions.
+        return np.cumsum([0, *(sizes @ [k, 1])])
+
+    def new_locator(self, nx, ny, nx1=None, ny1=None):
+        """
+        Return an axes locator callable for the specified cell.
+
+        Parameters
+        ----------
+        nx, nx1 : int
+            Integers specifying the column-position of the
+            cell. When *nx1* is None, a single *nx*-th column is
+            specified. Otherwise, location of columns spanning between *nx*
+            to *nx1* (but excluding *nx1*-th column) is specified.
+        ny, ny1 : int
+            Same as *nx* and *nx1*, but for row positions.
+        """
+        if nx1 is None:
+            nx1 = nx + 1
+        if ny1 is None:
+            ny1 = ny + 1
+        # append_size("left") adds a new size at the beginning of the
+        # horizontal size lists; this shift transforms e.g.
+        # new_locator(nx=2, ...) into effectively new_locator(nx=3, ...).  To
+        # take that into account, instead of recording nx, we record
+        # nx-self._xrefindex, where _xrefindex is shifted by 1 by each
+        # append_size("left"), and re-add self._xrefindex back to nx in
+        # _locate, when the actual axes position is computed.  Ditto for y.
+        xref = self._xrefindex
+        yref = self._yrefindex
+        locator = functools.partial(
+            self._locate, nx - xref, ny - yref, nx1 - xref, ny1 - yref)
+        locator.get_subplotspec = self.get_subplotspec
+        return locator
+
+    @_api.deprecated(
+        "3.8", alternative="divider.new_locator(...)(ax, renderer)")
+    def locate(self, nx, ny, nx1=None, ny1=None, axes=None, renderer=None):
+        """
+        Implementation of ``divider.new_locator().__call__``.
+
+        Parameters
+        ----------
+        nx, nx1 : int
+            Integers specifying the column-position of the cell. When *nx1* is
+            None, a single *nx*-th column is specified. Otherwise, the
+            location of columns spanning between *nx* to *nx1* (but excluding
+            *nx1*-th column) is specified.
+        ny, ny1 : int
+            Same as *nx* and *nx1*, but for row positions.
+        axes
+        renderer
+        """
+        xref = self._xrefindex
+        yref = self._yrefindex
+        return self._locate(
+            nx - xref, (nx + 1 if nx1 is None else nx1) - xref,
+            ny - yref, (ny + 1 if ny1 is None else ny1) - yref,
+            axes, renderer)
+
+    def _locate(self, nx, ny, nx1, ny1, axes, renderer):
+        """
+        Implementation of ``divider.new_locator().__call__``.
+
+        The axes locator callable returned by ``new_locator()`` is created as
+        a `functools.partial` of this method with *nx*, *ny*, *nx1*, and *ny1*
+        specifying the requested cell.
+        """
+        nx += self._xrefindex
+        nx1 += self._xrefindex
+        ny += self._yrefindex
+        ny1 += self._yrefindex
+
+        fig_w, fig_h = self._fig.bbox.size / self._fig.dpi
+        x, y, w, h = self.get_position_runtime(axes, renderer)
+
+        hsizes = self.get_horizontal_sizes(renderer)
+        vsizes = self.get_vertical_sizes(renderer)
+        k_h = self._calc_k(hsizes, fig_w * w)
+        k_v = self._calc_k(vsizes, fig_h * h)
+
+        if self.get_aspect():
+            k = min(k_h, k_v)
+            ox = self._calc_offsets(hsizes, k)
+            oy = self._calc_offsets(vsizes, k)
+
+            ww = (ox[-1] - ox[0]) / fig_w
+            hh = (oy[-1] - oy[0]) / fig_h
+            pb = mtransforms.Bbox.from_bounds(x, y, w, h)
+            pb1 = mtransforms.Bbox.from_bounds(x, y, ww, hh)
+            x0, y0 = pb1.anchored(self.get_anchor(), pb).p0
+
+        else:
+            ox = self._calc_offsets(hsizes, k_h)
+            oy = self._calc_offsets(vsizes, k_v)
+            x0, y0 = x, y
+
+        if nx1 is None:
+            nx1 = -1
+        if ny1 is None:
+            ny1 = -1
+
+        x1, w1 = x0 + ox[nx] / fig_w, (ox[nx1] - ox[nx]) / fig_w
+        y1, h1 = y0 + oy[ny] / fig_h, (oy[ny1] - oy[ny]) / fig_h
+
+        return mtransforms.Bbox.from_bounds(x1, y1, w1, h1)
+
+    def append_size(self, position, size):
+        _api.check_in_list(["left", "right", "bottom", "top"],
+                           position=position)
+        if position == "left":
+            self._horizontal.insert(0, size)
+            self._xrefindex += 1
+        elif position == "right":
+            self._horizontal.append(size)
+        elif position == "bottom":
+            self._vertical.insert(0, size)
+            self._yrefindex += 1
+        else:  # 'top'
+            self._vertical.append(size)
+
+    def add_auto_adjustable_area(self, use_axes, pad=0.1, adjust_dirs=None):
+        """
+        Add auto-adjustable padding around *use_axes* to take their decorations
+        (title, labels, ticks, ticklabels) into account during layout.
+
+        Parameters
+        ----------
+        use_axes : `~matplotlib.axes.Axes` or list of `~matplotlib.axes.Axes`
+            The Axes whose decorations are taken into account.
+        pad : float, default: 0.1
+            Additional padding in inches.
+        adjust_dirs : list of {"left", "right", "bottom", "top"}, optional
+            The sides where padding is added; defaults to all four sides.
+        """
+        if adjust_dirs is None:
+            adjust_dirs = ["left", "right", "bottom", "top"]
+        for d in adjust_dirs:
+            self.append_size(d, Size._AxesDecorationsSize(use_axes, d) + pad)
+
+
+@_api.deprecated("3.8")
+class AxesLocator:
+    """
+    A callable object which returns the position and size of a given
+    `.AxesDivider` cell.
+    """
+
+    def __init__(self, axes_divider, nx, ny, nx1=None, ny1=None):
+        """
+        Parameters
+        ----------
+        axes_divider : `~mpl_toolkits.axes_grid1.axes_divider.AxesDivider`
+        nx, nx1 : int
+            Integers specifying the column-position of the
+            cell. When *nx1* is None, a single *nx*-th column is
+            specified. Otherwise, location of columns spanning between *nx*
+            to *nx1* (but excluding *nx1*-th column) is specified.
+        ny, ny1 : int
+            Same as *nx* and *nx1*, but for row positions.
+        """
+        self._axes_divider = axes_divider
+
+        _xrefindex = axes_divider._xrefindex
+        _yrefindex = axes_divider._yrefindex
+
+        self._nx, self._ny = nx - _xrefindex, ny - _yrefindex
+
+        if nx1 is None:
+            nx1 = len(self._axes_divider)
+        if ny1 is None:
+            ny1 = len(self._axes_divider[0])
+
+        self._nx1 = nx1 - _xrefindex
+        self._ny1 = ny1 - _yrefindex
+
+    def __call__(self, axes, renderer):
+
+        _xrefindex = self._axes_divider._xrefindex
+        _yrefindex = self._axes_divider._yrefindex
+
+        return self._axes_divider.locate(self._nx + _xrefindex,
+                                         self._ny + _yrefindex,
+                                         self._nx1 + _xrefindex,
+                                         self._ny1 + _yrefindex,
+                                         axes,
+                                         renderer)
+
+    def get_subplotspec(self):
+        return self._axes_divider.get_subplotspec()
+
+
+class SubplotDivider(Divider):
+    """
+    The Divider class whose rectangle area is specified as a subplot geometry.
+    """
+
+    def __init__(self, fig, *args, horizontal=None, vertical=None,
+                 aspect=None, anchor='C'):
+        """
+        Parameters
+        ----------
+        fig : `~matplotlib.figure.Figure`
+
+        *args : tuple (*nrows*, *ncols*, *index*) or int
+            The array of subplots in the figure has dimensions ``(nrows,
+            ncols)``, and *index* is the index of the subplot being created.
+            *index* starts at 1 in the upper left corner and increases to the
+            right.
+
+            If *nrows*, *ncols*, and *index* are all single digit numbers, then
+            *args* can be passed as a single 3-digit number (e.g. 234 for
+            (2, 3, 4)).
+        horizontal : list of :mod:`~mpl_toolkits.axes_grid1.axes_size`, optional
+            Sizes for horizontal division.
+        vertical : list of :mod:`~mpl_toolkits.axes_grid1.axes_size`, optional
+            Sizes for vertical division.
+        aspect : bool, optional
+            Whether overall rectangular area is reduced so that the relative
+            part of the horizontal and vertical scales have the same scale.
+        anchor : (float, float) or {'C', 'SW', 'S', 'SE', 'E', 'NE', 'N', \
+'NW', 'W'}, default: 'C'
+            Placement of the reduced rectangle, when *aspect* is True.
+        """
+        self.figure = fig
+        super().__init__(fig, [0, 0, 1, 1],
+                         horizontal=horizontal or [], vertical=vertical or [],
+                         aspect=aspect, anchor=anchor)
+        self.set_subplotspec(SubplotSpec._from_subplot_args(fig, args))
+
+    def get_position(self):
+        """Return the bounds of the subplot box."""
+        return self.get_subplotspec().get_position(self.figure).bounds
+
+    def get_subplotspec(self):
+        """Get the SubplotSpec instance."""
+        return self._subplotspec
+
+    def set_subplotspec(self, subplotspec):
+        """Set the SubplotSpec instance."""
+        self._subplotspec = subplotspec
+        self.set_position(subplotspec.get_position(self.figure))
+
+
+class AxesDivider(Divider):
+    """
+    Divider based on the preexisting axes.
+    """
+
+    def __init__(self, axes, xref=None, yref=None):
+        """
+        Parameters
+        ----------
+        axes : :class:`~matplotlib.axes.Axes`
+        xref
+        yref
+        """
+        self._axes = axes
+        if xref is None:
+            self._xref = Size.AxesX(axes)
+        else:
+            self._xref = xref
+        if yref is None:
+            self._yref = Size.AxesY(axes)
+        else:
+            self._yref = yref
+
+        super().__init__(fig=axes.get_figure(), pos=None,
+                         horizontal=[self._xref], vertical=[self._yref],
+                         aspect=None, anchor="C")
+
+    def _get_new_axes(self, *, axes_class=None, **kwargs):
+        axes = self._axes
+        if axes_class is None:
+            axes_class = type(axes)
+        return axes_class(axes.get_figure(), axes.get_position(original=True),
+                          **kwargs)
+
+    def new_horizontal(self, size, pad=None, pack_start=False, **kwargs):
+        """
+        Helper method for ``append_axes("left")`` and ``append_axes("right")``.
+
+        See the documentation of `append_axes` for more details.
+
+        :meta private:
+        """
+        if pad is None:
+            pad = mpl.rcParams["figure.subplot.wspace"] * self._xref
+        pos = "left" if pack_start else "right"
+        if pad:
+            if not isinstance(pad, Size._Base):
+                pad = Size.from_any(pad, fraction_ref=self._xref)
+            self.append_size(pos, pad)
+        if not isinstance(size, Size._Base):
+            size = Size.from_any(size, fraction_ref=self._xref)
+        self.append_size(pos, size)
+        locator = self.new_locator(
+            nx=0 if pack_start else len(self._horizontal) - 1,
+            ny=self._yrefindex)
+        ax = self._get_new_axes(**kwargs)
+        ax.set_axes_locator(locator)
+        return ax
+
+    def new_vertical(self, size, pad=None, pack_start=False, **kwargs):
+        """
+        Helper method for ``append_axes("top")`` and ``append_axes("bottom")``.
+
+        See the documentation of `append_axes` for more details.
+
+        :meta private:
+        """
+        if pad is None:
+            pad = mpl.rcParams["figure.subplot.hspace"] * self._yref
+        pos = "bottom" if pack_start else "top"
+        if pad:
+            if not isinstance(pad, Size._Base):
+                pad = Size.from_any(pad, fraction_ref=self._yref)
+            self.append_size(pos, pad)
+        if not isinstance(size, Size._Base):
+            size = Size.from_any(size, fraction_ref=self._yref)
+        self.append_size(pos, size)
+        locator = self.new_locator(
+            nx=self._xrefindex,
+            ny=0 if pack_start else len(self._vertical) - 1)
+        ax = self._get_new_axes(**kwargs)
+        ax.set_axes_locator(locator)
+        return ax
+
+    def append_axes(self, position, size, pad=None, *, axes_class=None,
+                    **kwargs):
+        """
+        Add a new axes on a given side of the main axes.
+
+        Parameters
+        ----------
+        position : {"left", "right", "bottom", "top"}
+            Where the new axes is positioned relative to the main axes.
+        size : :mod:`~mpl_toolkits.axes_grid1.axes_size` or float or str
+            The axes width or height.  float or str arguments are interpreted
+            as ``axes_size.from_any(size, AxesX(<main_axes>))`` for left or
+            right axes, and likewise with ``AxesY`` for bottom or top axes.
+        pad : :mod:`~mpl_toolkits.axes_grid1.axes_size` or float or str
+            Padding between the axes.  float or str arguments are interpreted
+            as for *size*.  Defaults to :rc:`figure.subplot.wspace` times the
+            main Axes width (left or right axes) or :rc:`figure.subplot.hspace`
+            times the main Axes height (bottom or top axes).
+        axes_class : subclass type of `~.axes.Axes`, optional
+            The type of the new axes.  Defaults to the type of the main axes.
+        **kwargs
+            All extra keywords arguments are passed to the created axes.
+        """
+        create_axes, pack_start = _api.check_getitem({
+            "left": (self.new_horizontal, True),
+            "right": (self.new_horizontal, False),
+            "bottom": (self.new_vertical, True),
+            "top": (self.new_vertical, False),
+        }, position=position)
+        ax = create_axes(
+            size, pad, pack_start=pack_start, axes_class=axes_class, **kwargs)
+        self._fig.add_axes(ax)
+        return ax
+
+    def get_aspect(self):
+        if self._aspect is None:
+            aspect = self._axes.get_aspect()
+            if aspect == "auto":
+                return False
+            else:
+                return True
+        else:
+            return self._aspect
+
+    def get_position(self):
+        if self._pos is None:
+            bbox = self._axes.get_position(original=True)
+            return bbox.bounds
+        else:
+            return self._pos
+
+    def get_anchor(self):
+        if self._anchor is None:
+            return self._axes.get_anchor()
+        else:
+            return self._anchor
+
+    def get_subplotspec(self):
+        return self._axes.get_subplotspec()
+
+
+# Helper for HBoxDivider/VBoxDivider.
+# The variable names are written for a horizontal layout, but the calculations
+# work identically for vertical layouts.
+def _locate(x, y, w, h, summed_widths, equal_heights, fig_w, fig_h, anchor):
+
+    total_width = fig_w * w
+    max_height = fig_h * h
+
+    # Determine the k factors.
+    n = len(equal_heights)
+    eq_rels, eq_abss = equal_heights.T
+    sm_rels, sm_abss = summed_widths.T
+    A = np.diag([*eq_rels, 0])
+    A[:n, -1] = -1
+    A[-1, :-1] = sm_rels
+    B = [*(-eq_abss), total_width - sm_abss.sum()]
+    # A @ K = B: This finds factors {k_0, ..., k_{N-1}, H} so that
+    #   eq_rel_i * k_i + eq_abs_i = H for all i: all axes have the same height
+    #   sum(sm_rel_i * k_i + sm_abs_i) = total_width: fixed total width
+    # (foo_rel_i * k_i + foo_abs_i will end up being the size of foo.)
+    *karray, height = np.linalg.solve(A, B)
+    if height > max_height:  # Additionally, upper-bound the height.
+        karray = (max_height - eq_abss) / eq_rels
+
+    # Compute the offsets corresponding to these factors.
+    ox = np.cumsum([0, *(sm_rels * karray + sm_abss)])
+    ww = (ox[-1] - ox[0]) / fig_w
+    h0_rel, h0_abs = equal_heights[0]
+    hh = (karray[0]*h0_rel + h0_abs) / fig_h
+    pb = mtransforms.Bbox.from_bounds(x, y, w, h)
+    pb1 = mtransforms.Bbox.from_bounds(x, y, ww, hh)
+    x0, y0 = pb1.anchored(anchor, pb).p0
+
+    return x0, y0, ox, hh
+
+
+class HBoxDivider(SubplotDivider):
+    """
+    A `.SubplotDivider` for laying out axes horizontally, while ensuring that
+    they have equal heights.
+
+    Examples
+    --------
+    .. plot:: gallery/axes_grid1/demo_axes_hbox_divider.py
+    """
+
+    def new_locator(self, nx, nx1=None):
+        """
+        Create an axes locator callable for the specified cell.
+
+        Parameters
+        ----------
+        nx, nx1 : int
+            Integers specifying the column-position of the
+            cell. When *nx1* is None, a single *nx*-th column is
+            specified. Otherwise, location of columns spanning between *nx*
+            to *nx1* (but excluding *nx1*-th column) is specified.
+        """
+        return super().new_locator(nx, 0, nx1, 0)
+
+    def _locate(self, nx, ny, nx1, ny1, axes, renderer):
+        # docstring inherited
+        nx += self._xrefindex
+        nx1 += self._xrefindex
+        fig_w, fig_h = self._fig.bbox.size / self._fig.dpi
+        x, y, w, h = self.get_position_runtime(axes, renderer)
+        summed_ws = self.get_horizontal_sizes(renderer)
+        equal_hs = self.get_vertical_sizes(renderer)
+        x0, y0, ox, hh = _locate(
+            x, y, w, h, summed_ws, equal_hs, fig_w, fig_h, self.get_anchor())
+        if nx1 is None:
+            nx1 = -1
+        x1, w1 = x0 + ox[nx] / fig_w, (ox[nx1] - ox[nx]) / fig_w
+        y1, h1 = y0, hh
+        return mtransforms.Bbox.from_bounds(x1, y1, w1, h1)
+
+
+class VBoxDivider(SubplotDivider):
+    """
+    A `.SubplotDivider` for laying out axes vertically, while ensuring that
+    they have equal widths.
+    """
+
+    def new_locator(self, ny, ny1=None):
+        """
+        Create an axes locator callable for the specified cell.
+
+        Parameters
+        ----------
+        ny, ny1 : int
+            Integers specifying the row-position of the
+            cell. When *ny1* is None, a single *ny*-th row is
+            specified. Otherwise, location of rows spanning between *ny*
+            to *ny1* (but excluding *ny1*-th row) is specified.
+        """
+        return super().new_locator(0, ny, 0, ny1)
+
+    def _locate(self, nx, ny, nx1, ny1, axes, renderer):
+        # docstring inherited
+        ny += self._yrefindex
+        ny1 += self._yrefindex
+        fig_w, fig_h = self._fig.bbox.size / self._fig.dpi
+        x, y, w, h = self.get_position_runtime(axes, renderer)
+        summed_hs = self.get_vertical_sizes(renderer)
+        equal_ws = self.get_horizontal_sizes(renderer)
+        y0, x0, oy, ww = _locate(
+            y, x, h, w, summed_hs, equal_ws, fig_h, fig_w, self.get_anchor())
+        if ny1 is None:
+            ny1 = -1
+        x1, w1 = x0, ww
+        y1, h1 = y0 + oy[ny] / fig_h, (oy[ny1] - oy[ny]) / fig_h
+        return mtransforms.Bbox.from_bounds(x1, y1, w1, h1)
+
+
+def make_axes_locatable(axes):
+    divider = AxesDivider(axes)
+    locator = divider.new_locator(nx=0, ny=0)
+    axes.set_axes_locator(locator)
+
+    return divider
+
+
+def make_axes_area_auto_adjustable(
+        ax, use_axes=None, pad=0.1, adjust_dirs=None):
+    """
+    Add auto-adjustable padding around *ax* to take its decorations (title,
+    labels, ticks, ticklabels) into account during layout, using
+    `.Divider.add_auto_adjustable_area`.
+
+    By default, padding is determined from the decorations of *ax*.
+    Pass *use_axes* to consider the decorations of other Axes instead.
+    """
+    if adjust_dirs is None:
+        adjust_dirs = ["left", "right", "bottom", "top"]
+    divider = make_axes_locatable(ax)
+    if use_axes is None:
+        use_axes = ax
+    divider.add_auto_adjustable_area(use_axes=use_axes, pad=pad,
+                                     adjust_dirs=adjust_dirs)

rl/Lib/site-packages/mpl_toolkits/axes_grid1/axes_grid.py

@@ -0,0 +1,563 @@
+from numbers import Number
+import functools
+from types import MethodType
+
+import numpy as np
+
+from matplotlib import _api, cbook
+from matplotlib.gridspec import SubplotSpec
+
+from .axes_divider import Size, SubplotDivider, Divider
+from .mpl_axes import Axes, SimpleAxisArtist
+
+
+class CbarAxesBase:
+    def __init__(self, *args, orientation, **kwargs):
+        self.orientation = orientation
+        super().__init__(*args, **kwargs)
+
+    def colorbar(self, mappable, **kwargs):
+        return self.figure.colorbar(
+            mappable, cax=self, location=self.orientation, **kwargs)
+
+    @_api.deprecated("3.8", alternative="ax.tick_params and colorbar.set_label")
+    def toggle_label(self, b):
+        axis = self.axis[self.orientation]
+        axis.toggle(ticklabels=b, label=b)
+
+
+_cbaraxes_class_factory = cbook._make_class_factory(CbarAxesBase, "Cbar{}")
+
+
+class Grid:
+    """
+    A grid of Axes.
+
+    In Matplotlib, the Axes location (and size) is specified in normalized
+    figure coordinates. This may not be ideal for images that needs to be
+    displayed with a given aspect ratio; for example, it is difficult to
+    display multiple images of a same size with some fixed padding between
+    them.  AxesGrid can be used in such case.
+
+    Attributes
+    ----------
+    axes_all : list of Axes
+        A flat list of Axes. Note that you can also access this directly
+        from the grid. The following is equivalent ::
+
+            grid[i] == grid.axes_all[i]
+            len(grid) == len(grid.axes_all)
+
+    axes_column : list of list of Axes
+        A 2D list of Axes where the first index is the column. This results
+        in the usage pattern ``grid.axes_column[col][row]``.
+    axes_row : list of list of Axes
+        A 2D list of Axes where the first index is the row. This results
+        in the usage pattern ``grid.axes_row[row][col]``.
+    axes_llc : Axes
+        The Axes in the lower left corner.
+    ngrids : int
+        Number of Axes in the grid.
+    """
+
+    _defaultAxesClass = Axes
+
+    def __init__(self, fig,
+                 rect,
+                 nrows_ncols,
+                 ngrids=None,
+                 direction="row",
+                 axes_pad=0.02,
+                 *,
+                 share_all=False,
+                 share_x=True,
+                 share_y=True,
+                 label_mode="L",
+                 axes_class=None,
+                 aspect=False,
+                 ):
+        """
+        Parameters
+        ----------
+        fig : `.Figure`
+            The parent figure.
+        rect : (float, float, float, float), (int, int, int), int, or \
+    `~.SubplotSpec`
+            The axes position, as a ``(left, bottom, width, height)`` tuple,
+            as a three-digit subplot position code (e.g., ``(1, 2, 1)`` or
+            ``121``), or as a `~.SubplotSpec`.
+        nrows_ncols : (int, int)
+            Number of rows and columns in the grid.
+        ngrids : int or None, default: None
+            If not None, only the first *ngrids* axes in the grid are created.
+        direction : {"row", "column"}, default: "row"
+            Whether axes are created in row-major ("row by row") or
+            column-major order ("column by column").  This also affects the
+            order in which axes are accessed using indexing (``grid[index]``).
+        axes_pad : float or (float, float), default: 0.02
+            Padding or (horizontal padding, vertical padding) between axes, in
+            inches.
+        share_all : bool, default: False
+            Whether all axes share their x- and y-axis.  Overrides *share_x*
+            and *share_y*.
+        share_x : bool, default: True
+            Whether all axes of a column share their x-axis.
+        share_y : bool, default: True
+            Whether all axes of a row share their y-axis.
+        label_mode : {"L", "1", "all", "keep"}, default: "L"
+            Determines which axes will get tick labels:
+
+            - "L": All axes on the left column get vertical tick labels;
+              all axes on the bottom row get horizontal tick labels.
+            - "1": Only the bottom left axes is labelled.
+            - "all": All axes are labelled.
+            - "keep": Do not do anything.
+
+        axes_class : subclass of `matplotlib.axes.Axes`, default: `.mpl_axes.Axes`
+            The type of Axes to create.
+        aspect : bool, default: False
+            Whether the axes aspect ratio follows the aspect ratio of the data
+            limits.
+        """
+        self._nrows, self._ncols = nrows_ncols
+
+        if ngrids is None:
+            ngrids = self._nrows * self._ncols
+        else:
+            if not 0 < ngrids <= self._nrows * self._ncols:
+                raise ValueError(
+                    "ngrids must be positive and not larger than nrows*ncols")
+
+        self.ngrids = ngrids
+
+        self._horiz_pad_size, self._vert_pad_size = map(
+            Size.Fixed, np.broadcast_to(axes_pad, 2))
+
+        _api.check_in_list(["column", "row"], direction=direction)
+        self._direction = direction
+
+        if axes_class is None:
+            axes_class = self._defaultAxesClass
+        elif isinstance(axes_class, (list, tuple)):
+            cls, kwargs = axes_class
+            axes_class = functools.partial(cls, **kwargs)
+
+        kw = dict(horizontal=[], vertical=[], aspect=aspect)
+        if isinstance(rect, (Number, SubplotSpec)):
+            self._divider = SubplotDivider(fig, rect, **kw)
+        elif len(rect) == 3:
+            self._divider = SubplotDivider(fig, *rect, **kw)
+        elif len(rect) == 4:
+            self._divider = Divider(fig, rect, **kw)
+        else:
+            raise TypeError("Incorrect rect format")
+
+        rect = self._divider.get_position()
+
+        axes_array = np.full((self._nrows, self._ncols), None, dtype=object)
+        for i in range(self.ngrids):
+            col, row = self._get_col_row(i)
+            if share_all:
+                sharex = sharey = axes_array[0, 0]
+            else:
+                sharex = axes_array[0, col] if share_x else None
+                sharey = axes_array[row, 0] if share_y else None
+            axes_array[row, col] = axes_class(
+                fig, rect, sharex=sharex, sharey=sharey)
+        self.axes_all = axes_array.ravel(
+            order="C" if self._direction == "row" else "F").tolist()
+        self.axes_column = axes_array.T.tolist()
+        self.axes_row = axes_array.tolist()
+        self.axes_llc = self.axes_column[0][-1]
+
+        self._init_locators()
+
+        for ax in self.axes_all:
+            fig.add_axes(ax)
+
+        self.set_label_mode(label_mode)
+
+    def _init_locators(self):
+        self._divider.set_horizontal(
+            [Size.Scaled(1), self._horiz_pad_size] * (self._ncols-1) + [Size.Scaled(1)])
+        self._divider.set_vertical(
+            [Size.Scaled(1), self._vert_pad_size] * (self._nrows-1) + [Size.Scaled(1)])
+        for i in range(self.ngrids):
+            col, row = self._get_col_row(i)
+            self.axes_all[i].set_axes_locator(
+                self._divider.new_locator(nx=2 * col, ny=2 * (self._nrows - 1 - row)))
+
+    def _get_col_row(self, n):
+        if self._direction == "column":
+            col, row = divmod(n, self._nrows)
+        else:
+            row, col = divmod(n, self._ncols)
+
+        return col, row
+
+    # Good to propagate __len__ if we have __getitem__
+    def __len__(self):
+        return len(self.axes_all)
+
+    def __getitem__(self, i):
+        return self.axes_all[i]
+
+    def get_geometry(self):
+        """
+        Return the number of rows and columns of the grid as (nrows, ncols).
+        """
+        return self._nrows, self._ncols
+
+    def set_axes_pad(self, axes_pad):
+        """
+        Set the padding between the axes.
+
+        Parameters
+        ----------
+        axes_pad : (float, float)
+            The padding (horizontal pad, vertical pad) in inches.
+        """
+        self._horiz_pad_size.fixed_size = axes_pad[0]
+        self._vert_pad_size.fixed_size = axes_pad[1]
+
+    def get_axes_pad(self):
+        """
+        Return the axes padding.
+
+        Returns
+        -------
+        hpad, vpad
+            Padding (horizontal pad, vertical pad) in inches.
+        """
+        return (self._horiz_pad_size.fixed_size,
+                self._vert_pad_size.fixed_size)
+
+    def set_aspect(self, aspect):
+        """Set the aspect of the SubplotDivider."""
+        self._divider.set_aspect(aspect)
+
+    def get_aspect(self):
+        """Return the aspect of the SubplotDivider."""
+        return self._divider.get_aspect()
+
+    def set_label_mode(self, mode):
+        """
+        Define which axes have tick labels.
+
+        Parameters
+        ----------
+        mode : {"L", "1", "all", "keep"}
+            The label mode:
+
+            - "L": All axes on the left column get vertical tick labels;
+              all axes on the bottom row get horizontal tick labels.
+            - "1": Only the bottom left axes is labelled.
+            - "all": All axes are labelled.
+            - "keep": Do not do anything.
+        """
+        _api.check_in_list(["all", "L", "1", "keep"], mode=mode)
+        is_last_row, is_first_col = (
+            np.mgrid[:self._nrows, :self._ncols] == [[[self._nrows - 1]], [[0]]])
+        if mode == "all":
+            bottom = left = np.full((self._nrows, self._ncols), True)
+        elif mode == "L":
+            bottom = is_last_row
+            left = is_first_col
+        elif mode == "1":
+            bottom = left = is_last_row & is_first_col
+        else:
+            return
+        for i in range(self._nrows):
+            for j in range(self._ncols):
+                ax = self.axes_row[i][j]
+                if isinstance(ax.axis, MethodType):
+                    bottom_axis = SimpleAxisArtist(ax.xaxis, 1, ax.spines["bottom"])
+                    left_axis = SimpleAxisArtist(ax.yaxis, 1, ax.spines["left"])
+                else:
+                    bottom_axis = ax.axis["bottom"]
+                    left_axis = ax.axis["left"]
+                bottom_axis.toggle(ticklabels=bottom[i, j], label=bottom[i, j])
+                left_axis.toggle(ticklabels=left[i, j], label=left[i, j])
+
+    def get_divider(self):
+        return self._divider
+
+    def set_axes_locator(self, locator):
+        self._divider.set_locator(locator)
+
+    def get_axes_locator(self):
+        return self._divider.get_locator()
+
+
+class ImageGrid(Grid):
+    """
+    A grid of Axes for Image display.
+
+    This class is a specialization of `~.axes_grid1.axes_grid.Grid` for displaying a
+    grid of images.  In particular, it forces all axes in a column to share their x-axis
+    and all axes in a row to share their y-axis.  It further provides helpers to add
+    colorbars to some or all axes.
+    """
+
+    def __init__(self, fig,
+                 rect,
+                 nrows_ncols,
+                 ngrids=None,
+                 direction="row",
+                 axes_pad=0.02,
+                 *,
+                 share_all=False,
+                 aspect=True,
+                 label_mode="L",
+                 cbar_mode=None,
+                 cbar_location="right",
+                 cbar_pad=None,
+                 cbar_size="5%",
+                 cbar_set_cax=True,
+                 axes_class=None,
+                 ):
+        """
+        Parameters
+        ----------
+        fig : `.Figure`
+            The parent figure.
+        rect : (float, float, float, float) or int
+            The axes position, as a ``(left, bottom, width, height)`` tuple or
+            as a three-digit subplot position code (e.g., "121").
+        nrows_ncols : (int, int)
+            Number of rows and columns in the grid.
+        ngrids : int or None, default: None
+            If not None, only the first *ngrids* axes in the grid are created.
+        direction : {"row", "column"}, default: "row"
+            Whether axes are created in row-major ("row by row") or
+            column-major order ("column by column").  This also affects the
+            order in which axes are accessed using indexing (``grid[index]``).
+        axes_pad : float or (float, float), default: 0.02in
+            Padding or (horizontal padding, vertical padding) between axes, in
+            inches.
+        share_all : bool, default: False
+            Whether all axes share their x- and y-axis.  Note that in any case,
+            all axes in a column share their x-axis and all axes in a row share
+            their y-axis.
+        aspect : bool, default: True
+            Whether the axes aspect ratio follows the aspect ratio of the data
+            limits.
+        label_mode : {"L", "1", "all"}, default: "L"
+            Determines which axes will get tick labels:
+
+            - "L": All axes on the left column get vertical tick labels;
+              all axes on the bottom row get horizontal tick labels.
+            - "1": Only the bottom left axes is labelled.
+            - "all": all axes are labelled.
+
+        cbar_mode : {"each", "single", "edge", None}, default: None
+            Whether to create a colorbar for "each" axes, a "single" colorbar
+            for the entire grid, colorbars only for axes on the "edge"
+            determined by *cbar_location*, or no colorbars.  The colorbars are
+            stored in the :attr:`cbar_axes` attribute.
+        cbar_location : {"left", "right", "bottom", "top"}, default: "right"
+        cbar_pad : float, default: None
+            Padding between the image axes and the colorbar axes.
+        cbar_size : size specification (see `.Size.from_any`), default: "5%"
+            Colorbar size.
+        cbar_set_cax : bool, default: True
+            If True, each axes in the grid has a *cax* attribute that is bound
+            to associated *cbar_axes*.
+        axes_class : subclass of `matplotlib.axes.Axes`, default: None
+        """
+        _api.check_in_list(["each", "single", "edge", None],
+                           cbar_mode=cbar_mode)
+        _api.check_in_list(["left", "right", "bottom", "top"],
+                           cbar_location=cbar_location)
+        self._colorbar_mode = cbar_mode
+        self._colorbar_location = cbar_location
+        self._colorbar_pad = cbar_pad
+        self._colorbar_size = cbar_size
+        # The colorbar axes are created in _init_locators().
+
+        super().__init__(
+            fig, rect, nrows_ncols, ngrids,
+            direction=direction, axes_pad=axes_pad,
+            share_all=share_all, share_x=True, share_y=True, aspect=aspect,
+            label_mode=label_mode, axes_class=axes_class)
+
+        for ax in self.cbar_axes:
+            fig.add_axes(ax)
+
+        if cbar_set_cax:
+            if self._colorbar_mode == "single":
+                for ax in self.axes_all:
+                    ax.cax = self.cbar_axes[0]
+            elif self._colorbar_mode == "edge":
+                for index, ax in enumerate(self.axes_all):
+                    col, row = self._get_col_row(index)
+                    if self._colorbar_location in ("left", "right"):
+                        ax.cax = self.cbar_axes[row]
+                    else:
+                        ax.cax = self.cbar_axes[col]
+            else:
+                for ax, cax in zip(self.axes_all, self.cbar_axes):
+                    ax.cax = cax
+
+    def _init_locators(self):
+        # Slightly abusing this method to inject colorbar creation into init.
+
+        if self._colorbar_pad is None:
+            # horizontal or vertical arrangement?
+            if self._colorbar_location in ("left", "right"):
+                self._colorbar_pad = self._horiz_pad_size.fixed_size
+            else:
+                self._colorbar_pad = self._vert_pad_size.fixed_size
+        self.cbar_axes = [
+            _cbaraxes_class_factory(self._defaultAxesClass)(
+                self.axes_all[0].figure, self._divider.get_position(),
+                orientation=self._colorbar_location)
+            for _ in range(self.ngrids)]
+
+        cb_mode = self._colorbar_mode
+        cb_location = self._colorbar_location
+
+        h = []
+        v = []
+
+        h_ax_pos = []
+        h_cb_pos = []
+        if cb_mode == "single" and cb_location in ("left", "bottom"):
+            if cb_location == "left":
+                sz = self._nrows * Size.AxesX(self.axes_llc)
+                h.append(Size.from_any(self._colorbar_size, sz))
+                h.append(Size.from_any(self._colorbar_pad, sz))
+                locator = self._divider.new_locator(nx=0, ny=0, ny1=-1)
+            elif cb_location == "bottom":
+                sz = self._ncols * Size.AxesY(self.axes_llc)
+                v.append(Size.from_any(self._colorbar_size, sz))
+                v.append(Size.from_any(self._colorbar_pad, sz))
+                locator = self._divider.new_locator(nx=0, nx1=-1, ny=0)
+            for i in range(self.ngrids):
+                self.cbar_axes[i].set_visible(False)
+            self.cbar_axes[0].set_axes_locator(locator)
+            self.cbar_axes[0].set_visible(True)
+
+        for col, ax in enumerate(self.axes_row[0]):
+            if h:
+                h.append(self._horiz_pad_size)
+
+            if ax:
+                sz = Size.AxesX(ax, aspect="axes", ref_ax=self.axes_all[0])
+            else:
+                sz = Size.AxesX(self.axes_all[0],
+                                aspect="axes", ref_ax=self.axes_all[0])
+
+            if (cb_location == "left"
+                    and (cb_mode == "each"
+                         or (cb_mode == "edge" and col == 0))):
+                h_cb_pos.append(len(h))
+                h.append(Size.from_any(self._colorbar_size, sz))
+                h.append(Size.from_any(self._colorbar_pad, sz))
+
+            h_ax_pos.append(len(h))
+            h.append(sz)
+
+            if (cb_location == "right"
+                    and (cb_mode == "each"
+                         or (cb_mode == "edge" and col == self._ncols - 1))):
+                h.append(Size.from_any(self._colorbar_pad, sz))
+                h_cb_pos.append(len(h))
+                h.append(Size.from_any(self._colorbar_size, sz))
+
+        v_ax_pos = []
+        v_cb_pos = []
+        for row, ax in enumerate(self.axes_column[0][::-1]):
+            if v:
+                v.append(self._vert_pad_size)
+
+            if ax:
+                sz = Size.AxesY(ax, aspect="axes", ref_ax=self.axes_all[0])
+            else:
+                sz = Size.AxesY(self.axes_all[0],
+                                aspect="axes", ref_ax=self.axes_all[0])
+
+            if (cb_location == "bottom"
+                    and (cb_mode == "each"
+                         or (cb_mode == "edge" and row == 0))):
+                v_cb_pos.append(len(v))
+                v.append(Size.from_any(self._colorbar_size, sz))
+                v.append(Size.from_any(self._colorbar_pad, sz))
+
+            v_ax_pos.append(len(v))
+            v.append(sz)
+
+            if (cb_location == "top"
+                    and (cb_mode == "each"
+                         or (cb_mode == "edge" and row == self._nrows - 1))):
+                v.append(Size.from_any(self._colorbar_pad, sz))
+                v_cb_pos.append(len(v))
+                v.append(Size.from_any(self._colorbar_size, sz))
+
+        for i in range(self.ngrids):
+            col, row = self._get_col_row(i)
+            locator = self._divider.new_locator(nx=h_ax_pos[col],
+                                                ny=v_ax_pos[self._nrows-1-row])
+            self.axes_all[i].set_axes_locator(locator)
+
+            if cb_mode == "each":
+                if cb_location in ("right", "left"):
+                    locator = self._divider.new_locator(
+                        nx=h_cb_pos[col], ny=v_ax_pos[self._nrows - 1 - row])
+
+                elif cb_location in ("top", "bottom"):
+                    locator = self._divider.new_locator(
+                        nx=h_ax_pos[col], ny=v_cb_pos[self._nrows - 1 - row])
+
+                self.cbar_axes[i].set_axes_locator(locator)
+            elif cb_mode == "edge":
+                if (cb_location == "left" and col == 0
+                        or cb_location == "right" and col == self._ncols - 1):
+                    locator = self._divider.new_locator(
+                        nx=h_cb_pos[0], ny=v_ax_pos[self._nrows - 1 - row])
+                    self.cbar_axes[row].set_axes_locator(locator)
+                elif (cb_location == "bottom" and row == self._nrows - 1
+                      or cb_location == "top" and row == 0):
+                    locator = self._divider.new_locator(nx=h_ax_pos[col],
+                                                        ny=v_cb_pos[0])
+                    self.cbar_axes[col].set_axes_locator(locator)
+
+        if cb_mode == "single":
+            if cb_location == "right":
+                sz = self._nrows * Size.AxesX(self.axes_llc)
+                h.append(Size.from_any(self._colorbar_pad, sz))
+                h.append(Size.from_any(self._colorbar_size, sz))
+                locator = self._divider.new_locator(nx=-2, ny=0, ny1=-1)
+            elif cb_location == "top":
+                sz = self._ncols * Size.AxesY(self.axes_llc)
+                v.append(Size.from_any(self._colorbar_pad, sz))
+                v.append(Size.from_any(self._colorbar_size, sz))
+                locator = self._divider.new_locator(nx=0, nx1=-1, ny=-2)
+            if cb_location in ("right", "top"):
+                for i in range(self.ngrids):
+                    self.cbar_axes[i].set_visible(False)
+                self.cbar_axes[0].set_axes_locator(locator)
+                self.cbar_axes[0].set_visible(True)
+        elif cb_mode == "each":
+            for i in range(self.ngrids):
+                self.cbar_axes[i].set_visible(True)
+        elif cb_mode == "edge":
+            if cb_location in ("right", "left"):
+                count = self._nrows
+            else:
+                count = self._ncols
+            for i in range(count):
+                self.cbar_axes[i].set_visible(True)
+            for j in range(i + 1, self.ngrids):
+                self.cbar_axes[j].set_visible(False)
+        else:
+            for i in range(self.ngrids):
+                self.cbar_axes[i].set_visible(False)
+                self.cbar_axes[i].set_position([1., 1., 0.001, 0.001],
+                                               which="active")
+
+        self._divider.set_horizontal(h)
+        self._divider.set_vertical(v)
+
+
+AxesGrid = ImageGrid

rl/Lib/site-packages/mpl_toolkits/axes_grid1/axes_rgb.py

@@ -0,0 +1,157 @@
+from types import MethodType
+
+import numpy as np
+
+from .axes_divider import make_axes_locatable, Size
+from .mpl_axes import Axes, SimpleAxisArtist
+
+
+def make_rgb_axes(ax, pad=0.01, axes_class=None, **kwargs):
+    """
+    Parameters
+    ----------
+    ax : `~matplotlib.axes.Axes`
+        Axes instance to create the RGB Axes in.
+    pad : float, optional
+        Fraction of the Axes height to pad.
+    axes_class : `matplotlib.axes.Axes` or None, optional
+        Axes class to use for the R, G, and B Axes. If None, use
+        the same class as *ax*.
+    **kwargs
+        Forwarded to *axes_class* init for the R, G, and B Axes.
+    """
+
+    divider = make_axes_locatable(ax)
+
+    pad_size = pad * Size.AxesY(ax)
+
+    xsize = ((1-2*pad)/3) * Size.AxesX(ax)
+    ysize = ((1-2*pad)/3) * Size.AxesY(ax)
+
+    divider.set_horizontal([Size.AxesX(ax), pad_size, xsize])
+    divider.set_vertical([ysize, pad_size, ysize, pad_size, ysize])
+
+    ax.set_axes_locator(divider.new_locator(0, 0, ny1=-1))
+
+    ax_rgb = []
+    if axes_class is None:
+        axes_class = type(ax)
+
+    for ny in [4, 2, 0]:
+        ax1 = axes_class(ax.get_figure(), ax.get_position(original=True),
+                         sharex=ax, sharey=ax, **kwargs)
+        locator = divider.new_locator(nx=2, ny=ny)
+        ax1.set_axes_locator(locator)
+        for t in ax1.yaxis.get_ticklabels() + ax1.xaxis.get_ticklabels():
+            t.set_visible(False)
+        try:
+            for axis in ax1.axis.values():
+                axis.major_ticklabels.set_visible(False)
+        except AttributeError:
+            pass
+
+        ax_rgb.append(ax1)
+
+    fig = ax.get_figure()
+    for ax1 in ax_rgb:
+        fig.add_axes(ax1)
+
+    return ax_rgb
+
+
+class RGBAxes:
+    """
+    4-panel `~.Axes.imshow` (RGB, R, G, B).
+
+    Layout::
+
+        ┌───────────────┬─────┐
+        │               │  R  │
+        │               ├─────┤
+        │      RGB      │  G  │
+        │               ├─────┤
+        │               │  B  │
+        └───────────────┴─────┘
+
+    Subclasses can override the ``_defaultAxesClass`` attribute.
+    By default RGBAxes uses `.mpl_axes.Axes`.
+
+    Attributes
+    ----------
+    RGB : ``_defaultAxesClass``
+        The Axes object for the three-channel `~.Axes.imshow`.
+    R : ``_defaultAxesClass``
+        The Axes object for the red channel `~.Axes.imshow`.
+    G : ``_defaultAxesClass``
+        The Axes object for the green channel `~.Axes.imshow`.
+    B : ``_defaultAxesClass``
+        The Axes object for the blue channel `~.Axes.imshow`.
+    """
+
+    _defaultAxesClass = Axes
+
+    def __init__(self, *args, pad=0, **kwargs):
+        """
+        Parameters
+        ----------
+        pad : float, default: 0
+            Fraction of the Axes height to put as padding.
+        axes_class : `~matplotlib.axes.Axes`
+            Axes class to use. If not provided, ``_defaultAxesClass`` is used.
+        *args
+            Forwarded to *axes_class* init for the RGB Axes
+        **kwargs
+            Forwarded to *axes_class* init for the RGB, R, G, and B Axes
+        """
+        axes_class = kwargs.pop("axes_class", self._defaultAxesClass)
+        self.RGB = ax = axes_class(*args, **kwargs)
+        ax.get_figure().add_axes(ax)
+        self.R, self.G, self.B = make_rgb_axes(
+            ax, pad=pad, axes_class=axes_class, **kwargs)
+        # Set the line color and ticks for the axes.
+        for ax1 in [self.RGB, self.R, self.G, self.B]:
+            if isinstance(ax1.axis, MethodType):
+                ad = Axes.AxisDict(self)
+                ad.update(
+                    bottom=SimpleAxisArtist(ax1.xaxis, 1, ax1.spines["bottom"]),
+                    top=SimpleAxisArtist(ax1.xaxis, 2, ax1.spines["top"]),
+                    left=SimpleAxisArtist(ax1.yaxis, 1, ax1.spines["left"]),
+                    right=SimpleAxisArtist(ax1.yaxis, 2, ax1.spines["right"]))
+            else:
+                ad = ax1.axis
+            ad[:].line.set_color("w")
+            ad[:].major_ticks.set_markeredgecolor("w")
+
+    def imshow_rgb(self, r, g, b, **kwargs):
+        """
+        Create the four images {rgb, r, g, b}.
+
+        Parameters
+        ----------
+        r, g, b : array-like
+            The red, green, and blue arrays.
+        **kwargs
+            Forwarded to `~.Axes.imshow` calls for the four images.
+
+        Returns
+        -------
+        rgb : `~matplotlib.image.AxesImage`
+        r : `~matplotlib.image.AxesImage`
+        g : `~matplotlib.image.AxesImage`
+        b : `~matplotlib.image.AxesImage`
+        """
+        if not (r.shape == g.shape == b.shape):
+            raise ValueError(
+                f'Input shapes ({r.shape}, {g.shape}, {b.shape}) do not match')
+        RGB = np.dstack([r, g, b])
+        R = np.zeros_like(RGB)
+        R[:, :, 0] = r
+        G = np.zeros_like(RGB)
+        G[:, :, 1] = g
+        B = np.zeros_like(RGB)
+        B[:, :, 2] = b
+        im_rgb = self.RGB.imshow(RGB, **kwargs)
+        im_r = self.R.imshow(R, **kwargs)
+        im_g = self.G.imshow(G, **kwargs)
+        im_b = self.B.imshow(B, **kwargs)
+        return im_rgb, im_r, im_g, im_b

rl/Lib/site-packages/mpl_toolkits/axes_grid1/axes_size.py

@@ -0,0 +1,248 @@
+"""
+Provides classes of simple units that will be used with `.AxesDivider`
+class (or others) to determine the size of each Axes. The unit
+classes define `get_size` method that returns a tuple of two floats,
+meaning relative and absolute sizes, respectively.
+
+Note that this class is nothing more than a simple tuple of two
+floats. Take a look at the Divider class to see how these two
+values are used.
+"""
+
+from numbers import Real
+
+from matplotlib import _api
+from matplotlib.axes import Axes
+
+
+class _Base:
+    def __rmul__(self, other):
+        return Fraction(other, self)
+
+    def __add__(self, other):
+        if isinstance(other, _Base):
+            return Add(self, other)
+        else:
+            return Add(self, Fixed(other))
+
+    def get_size(self, renderer):
+        """
+        Return two-float tuple with relative and absolute sizes.
+        """
+        raise NotImplementedError("Subclasses must implement")
+
+
+class Add(_Base):
+    """
+    Sum of two sizes.
+    """
+
+    def __init__(self, a, b):
+        self._a = a
+        self._b = b
+
+    def get_size(self, renderer):
+        a_rel_size, a_abs_size = self._a.get_size(renderer)
+        b_rel_size, b_abs_size = self._b.get_size(renderer)
+        return a_rel_size + b_rel_size, a_abs_size + b_abs_size
+
+
+class Fixed(_Base):
+    """
+    Simple fixed size with absolute part = *fixed_size* and relative part = 0.
+    """
+
+    def __init__(self, fixed_size):
+        _api.check_isinstance(Real, fixed_size=fixed_size)
+        self.fixed_size = fixed_size
+
+    def get_size(self, renderer):
+        rel_size = 0.
+        abs_size = self.fixed_size
+        return rel_size, abs_size
+
+
+class Scaled(_Base):
+    """
+    Simple scaled(?) size with absolute part = 0 and
+    relative part = *scalable_size*.
+    """
+
+    def __init__(self, scalable_size):
+        self._scalable_size = scalable_size
+
+    def get_size(self, renderer):
+        rel_size = self._scalable_size
+        abs_size = 0.
+        return rel_size, abs_size
+
+Scalable = Scaled
+
+
+def _get_axes_aspect(ax):
+    aspect = ax.get_aspect()
+    if aspect == "auto":
+        aspect = 1.
+    return aspect
+
+
+class AxesX(_Base):
+    """
+    Scaled size whose relative part corresponds to the data width
+    of the *axes* multiplied by the *aspect*.
+    """
+
+    def __init__(self, axes, aspect=1., ref_ax=None):
+        self._axes = axes
+        self._aspect = aspect
+        if aspect == "axes" and ref_ax is None:
+            raise ValueError("ref_ax must be set when aspect='axes'")
+        self._ref_ax = ref_ax
+
+    def get_size(self, renderer):
+        l1, l2 = self._axes.get_xlim()
+        if self._aspect == "axes":
+            ref_aspect = _get_axes_aspect(self._ref_ax)
+            aspect = ref_aspect / _get_axes_aspect(self._axes)
+        else:
+            aspect = self._aspect
+
+        rel_size = abs(l2-l1)*aspect
+        abs_size = 0.
+        return rel_size, abs_size
+
+
+class AxesY(_Base):
+    """
+    Scaled size whose relative part corresponds to the data height
+    of the *axes* multiplied by the *aspect*.
+    """
+
+    def __init__(self, axes, aspect=1., ref_ax=None):
+        self._axes = axes
+        self._aspect = aspect
+        if aspect == "axes" and ref_ax is None:
+            raise ValueError("ref_ax must be set when aspect='axes'")
+        self._ref_ax = ref_ax
+
+    def get_size(self, renderer):
+        l1, l2 = self._axes.get_ylim()
+
+        if self._aspect == "axes":
+            ref_aspect = _get_axes_aspect(self._ref_ax)
+            aspect = _get_axes_aspect(self._axes)
+        else:
+            aspect = self._aspect
+
+        rel_size = abs(l2-l1)*aspect
+        abs_size = 0.
+        return rel_size, abs_size
+
+
+class MaxExtent(_Base):
+    """
+    Size whose absolute part is either the largest width or the largest height
+    of the given *artist_list*.
+    """
+
+    def __init__(self, artist_list, w_or_h):
+        self._artist_list = artist_list
+        _api.check_in_list(["width", "height"], w_or_h=w_or_h)
+        self._w_or_h = w_or_h
+
+    def add_artist(self, a):
+        self._artist_list.append(a)
+
+    def get_size(self, renderer):
+        rel_size = 0.
+        extent_list = [
+            getattr(a.get_window_extent(renderer), self._w_or_h) / a.figure.dpi
+            for a in self._artist_list]
+        abs_size = max(extent_list, default=0)
+        return rel_size, abs_size
+
+
+class MaxWidth(MaxExtent):
+    """
+    Size whose absolute part is the largest width of the given *artist_list*.
+    """
+
+    def __init__(self, artist_list):
+        super().__init__(artist_list, "width")
+
+
+class MaxHeight(MaxExtent):
+    """
+    Size whose absolute part is the largest height of the given *artist_list*.
+    """
+
+    def __init__(self, artist_list):
+        super().__init__(artist_list, "height")
+
+
+class Fraction(_Base):
+    """
+    An instance whose size is a *fraction* of the *ref_size*.
+
+    >>> s = Fraction(0.3, AxesX(ax))
+    """
+
+    def __init__(self, fraction, ref_size):
+        _api.check_isinstance(Real, fraction=fraction)
+        self._fraction_ref = ref_size
+        self._fraction = fraction
+
+    def get_size(self, renderer):
+        if self._fraction_ref is None:
+            return self._fraction, 0.
+        else:
+            r, a = self._fraction_ref.get_size(renderer)
+            rel_size = r*self._fraction
+            abs_size = a*self._fraction
+            return rel_size, abs_size
+
+
+def from_any(size, fraction_ref=None):
+    """
+    Create a Fixed unit when the first argument is a float, or a
+    Fraction unit if that is a string that ends with %. The second
+    argument is only meaningful when Fraction unit is created.
+
+    >>> from mpl_toolkits.axes_grid1.axes_size import from_any
+    >>> a = from_any(1.2) # => Fixed(1.2)
+    >>> from_any("50%", a) # => Fraction(0.5, a)
+    """
+    if isinstance(size, Real):
+        return Fixed(size)
+    elif isinstance(size, str):
+        if size[-1] == "%":
+            return Fraction(float(size[:-1]) / 100, fraction_ref)
+    raise ValueError("Unknown format")
+
+
+class _AxesDecorationsSize(_Base):
+    """
+    Fixed size, corresponding to the size of decorations on a given Axes side.
+    """
+
+    _get_size_map = {
+        "left":   lambda tight_bb, axes_bb: axes_bb.xmin - tight_bb.xmin,
+        "right":  lambda tight_bb, axes_bb: tight_bb.xmax - axes_bb.xmax,
+        "bottom": lambda tight_bb, axes_bb: axes_bb.ymin - tight_bb.ymin,
+        "top":    lambda tight_bb, axes_bb: tight_bb.ymax - axes_bb.ymax,
+    }
+
+    def __init__(self, ax, direction):
+        _api.check_in_list(self._get_size_map, direction=direction)
+        self._direction = direction
+        self._ax_list = [ax] if isinstance(ax, Axes) else ax
+
+    def get_size(self, renderer):
+        sz = max([
+            self._get_size_map[self._direction](
+                ax.get_tightbbox(renderer, call_axes_locator=False), ax.bbox)
+            for ax in self._ax_list])
+        dpi = renderer.points_to_pixels(72)
+        abs_size = sz / dpi
+        rel_size = 0
+        return rel_size, abs_size

rl/Lib/site-packages/mpl_toolkits/axes_grid1/inset_locator.py

@@ -0,0 +1,561 @@
+"""
+A collection of functions and objects for creating or placing inset axes.
+"""
+
+from matplotlib import _api, _docstring
+from matplotlib.offsetbox import AnchoredOffsetbox
+from matplotlib.patches import Patch, Rectangle
+from matplotlib.path import Path
+from matplotlib.transforms import Bbox, BboxTransformTo
+from matplotlib.transforms import IdentityTransform, TransformedBbox
+
+from . import axes_size as Size
+from .parasite_axes import HostAxes
+
+
+@_api.deprecated("3.8", alternative="Axes.inset_axes")
+class InsetPosition:
+    @_docstring.dedent_interpd
+    def __init__(self, parent, lbwh):
+        """
+        An object for positioning an inset axes.
+
+        This is created by specifying the normalized coordinates in the axes,
+        instead of the figure.
+
+        Parameters
+        ----------
+        parent : `~matplotlib.axes.Axes`
+            Axes to use for normalizing coordinates.
+
+        lbwh : iterable of four floats
+            The left edge, bottom edge, width, and height of the inset axes, in
+            units of the normalized coordinate of the *parent* axes.
+
+        See Also
+        --------
+        :meth:`matplotlib.axes.Axes.set_axes_locator`
+
+        Examples
+        --------
+        The following bounds the inset axes to a box with 20%% of the parent
+        axes height and 40%% of the width. The size of the axes specified
+        ([0, 0, 1, 1]) ensures that the axes completely fills the bounding box:
+
+        >>> parent_axes = plt.gca()
+        >>> ax_ins = plt.axes([0, 0, 1, 1])
+        >>> ip = InsetPosition(parent_axes, [0.5, 0.1, 0.4, 0.2])
+        >>> ax_ins.set_axes_locator(ip)
+        """
+        self.parent = parent
+        self.lbwh = lbwh
+
+    def __call__(self, ax, renderer):
+        bbox_parent = self.parent.get_position(original=False)
+        trans = BboxTransformTo(bbox_parent)
+        bbox_inset = Bbox.from_bounds(*self.lbwh)
+        bb = TransformedBbox(bbox_inset, trans)
+        return bb
+
+
+class AnchoredLocatorBase(AnchoredOffsetbox):
+    def __init__(self, bbox_to_anchor, offsetbox, loc,
+                 borderpad=0.5, bbox_transform=None):
+        super().__init__(
+            loc, pad=0., child=None, borderpad=borderpad,
+            bbox_to_anchor=bbox_to_anchor, bbox_transform=bbox_transform
+        )
+
+    def draw(self, renderer):
+        raise RuntimeError("No draw method should be called")
+
+    def __call__(self, ax, renderer):
+        if renderer is None:
+            renderer = ax.figure._get_renderer()
+        self.axes = ax
+        bbox = self.get_window_extent(renderer)
+        px, py = self.get_offset(bbox.width, bbox.height, 0, 0, renderer)
+        bbox_canvas = Bbox.from_bounds(px, py, bbox.width, bbox.height)
+        tr = ax.figure.transSubfigure.inverted()
+        return TransformedBbox(bbox_canvas, tr)
+
+
+class AnchoredSizeLocator(AnchoredLocatorBase):
+    def __init__(self, bbox_to_anchor, x_size, y_size, loc,
+                 borderpad=0.5, bbox_transform=None):
+        super().__init__(
+            bbox_to_anchor, None, loc,
+            borderpad=borderpad, bbox_transform=bbox_transform
+        )
+
+        self.x_size = Size.from_any(x_size)
+        self.y_size = Size.from_any(y_size)
+
+    def get_bbox(self, renderer):
+        bbox = self.get_bbox_to_anchor()
+        dpi = renderer.points_to_pixels(72.)
+
+        r, a = self.x_size.get_size(renderer)
+        width = bbox.width * r + a * dpi
+        r, a = self.y_size.get_size(renderer)
+        height = bbox.height * r + a * dpi
+
+        fontsize = renderer.points_to_pixels(self.prop.get_size_in_points())
+        pad = self.pad * fontsize
+
+        return Bbox.from_bounds(0, 0, width, height).padded(pad)
+
+
+class AnchoredZoomLocator(AnchoredLocatorBase):
+    def __init__(self, parent_axes, zoom, loc,
+                 borderpad=0.5,
+                 bbox_to_anchor=None,
+                 bbox_transform=None):
+        self.parent_axes = parent_axes
+        self.zoom = zoom
+        if bbox_to_anchor is None:
+            bbox_to_anchor = parent_axes.bbox
+        super().__init__(
+            bbox_to_anchor, None, loc, borderpad=borderpad,
+            bbox_transform=bbox_transform)
+
+    def get_bbox(self, renderer):
+        bb = self.parent_axes.transData.transform_bbox(self.axes.viewLim)
+        fontsize = renderer.points_to_pixels(self.prop.get_size_in_points())
+        pad = self.pad * fontsize
+        return (
+            Bbox.from_bounds(
+                0, 0, abs(bb.width * self.zoom), abs(bb.height * self.zoom))
+            .padded(pad))
+
+
+class BboxPatch(Patch):
+    @_docstring.dedent_interpd
+    def __init__(self, bbox, **kwargs):
+        """
+        Patch showing the shape bounded by a Bbox.
+
+        Parameters
+        ----------
+        bbox : `~matplotlib.transforms.Bbox`
+            Bbox to use for the extents of this patch.
+
+        **kwargs
+            Patch properties. Valid arguments include:
+
+            %(Patch:kwdoc)s
+        """
+        if "transform" in kwargs:
+            raise ValueError("transform should not be set")
+
+        kwargs["transform"] = IdentityTransform()
+        super().__init__(**kwargs)
+        self.bbox = bbox
+
+    def get_path(self):
+        # docstring inherited
+        x0, y0, x1, y1 = self.bbox.extents
+        return Path._create_closed([(x0, y0), (x1, y0), (x1, y1), (x0, y1)])
+
+
+class BboxConnector(Patch):
+    @staticmethod
+    def get_bbox_edge_pos(bbox, loc):
+        """
+        Return the ``(x, y)`` coordinates of corner *loc* of *bbox*; parameters
+        behave as documented for the `.BboxConnector` constructor.
+        """
+        x0, y0, x1, y1 = bbox.extents
+        if loc == 1:
+            return x1, y1
+        elif loc == 2:
+            return x0, y1
+        elif loc == 3:
+            return x0, y0
+        elif loc == 4:
+            return x1, y0
+
+    @staticmethod
+    def connect_bbox(bbox1, bbox2, loc1, loc2=None):
+        """
+        Construct a `.Path` connecting corner *loc1* of *bbox1* to corner
+        *loc2* of *bbox2*, where parameters behave as documented as for the
+        `.BboxConnector` constructor.
+        """
+        if isinstance(bbox1, Rectangle):
+            bbox1 = TransformedBbox(Bbox.unit(), bbox1.get_transform())
+        if isinstance(bbox2, Rectangle):
+            bbox2 = TransformedBbox(Bbox.unit(), bbox2.get_transform())
+        if loc2 is None:
+            loc2 = loc1
+        x1, y1 = BboxConnector.get_bbox_edge_pos(bbox1, loc1)
+        x2, y2 = BboxConnector.get_bbox_edge_pos(bbox2, loc2)
+        return Path([[x1, y1], [x2, y2]])
+
+    @_docstring.dedent_interpd
+    def __init__(self, bbox1, bbox2, loc1, loc2=None, **kwargs):
+        """
+        Connect two bboxes with a straight line.
+
+        Parameters
+        ----------
+        bbox1, bbox2 : `~matplotlib.transforms.Bbox`
+            Bounding boxes to connect.
+
+        loc1, loc2 : {1, 2, 3, 4}
+            Corner of *bbox1* and *bbox2* to draw the line. Valid values are::
+
+                'upper right'  : 1,
+                'upper left'   : 2,
+                'lower left'   : 3,
+                'lower right'  : 4
+
+            *loc2* is optional and defaults to *loc1*.
+
+        **kwargs
+            Patch properties for the line drawn. Valid arguments include:
+
+            %(Patch:kwdoc)s
+        """
+        if "transform" in kwargs:
+            raise ValueError("transform should not be set")
+
+        kwargs["transform"] = IdentityTransform()
+        kwargs.setdefault(
+            "fill", bool({'fc', 'facecolor', 'color'}.intersection(kwargs)))
+        super().__init__(**kwargs)
+        self.bbox1 = bbox1
+        self.bbox2 = bbox2
+        self.loc1 = loc1
+        self.loc2 = loc2
+
+    def get_path(self):
+        # docstring inherited
+        return self.connect_bbox(self.bbox1, self.bbox2,
+                                 self.loc1, self.loc2)
+
+
+class BboxConnectorPatch(BboxConnector):
+    @_docstring.dedent_interpd
+    def __init__(self, bbox1, bbox2, loc1a, loc2a, loc1b, loc2b, **kwargs):
+        """
+        Connect two bboxes with a quadrilateral.
+
+        The quadrilateral is specified by two lines that start and end at
+        corners of the bboxes. The four sides of the quadrilateral are defined
+        by the two lines given, the line between the two corners specified in
+        *bbox1* and the line between the two corners specified in *bbox2*.
+
+        Parameters
+        ----------
+        bbox1, bbox2 : `~matplotlib.transforms.Bbox`
+            Bounding boxes to connect.
+
+        loc1a, loc2a, loc1b, loc2b : {1, 2, 3, 4}
+            The first line connects corners *loc1a* of *bbox1* and *loc2a* of
+            *bbox2*; the second line connects corners *loc1b* of *bbox1* and
+            *loc2b* of *bbox2*.  Valid values are::
+
+                'upper right'  : 1,
+                'upper left'   : 2,
+                'lower left'   : 3,
+                'lower right'  : 4
+
+        **kwargs
+            Patch properties for the line drawn:
+
+            %(Patch:kwdoc)s
+        """
+        if "transform" in kwargs:
+            raise ValueError("transform should not be set")
+        super().__init__(bbox1, bbox2, loc1a, loc2a, **kwargs)
+        self.loc1b = loc1b
+        self.loc2b = loc2b
+
+    def get_path(self):
+        # docstring inherited
+        path1 = self.connect_bbox(self.bbox1, self.bbox2, self.loc1, self.loc2)
+        path2 = self.connect_bbox(self.bbox2, self.bbox1,
+                                  self.loc2b, self.loc1b)
+        path_merged = [*path1.vertices, *path2.vertices, path1.vertices[0]]
+        return Path(path_merged)
+
+
+def _add_inset_axes(parent_axes, axes_class, axes_kwargs, axes_locator):
+    """Helper function to add an inset axes and disable navigation in it."""
+    if axes_class is None:
+        axes_class = HostAxes
+    if axes_kwargs is None:
+        axes_kwargs = {}
+    inset_axes = axes_class(
+        parent_axes.figure, parent_axes.get_position(),
+        **{"navigate": False, **axes_kwargs, "axes_locator": axes_locator})
+    return parent_axes.figure.add_axes(inset_axes)
+
+
+@_docstring.dedent_interpd
+def inset_axes(parent_axes, width, height, loc='upper right',
+               bbox_to_anchor=None, bbox_transform=None,
+               axes_class=None, axes_kwargs=None,
+               borderpad=0.5):
+    """
+    Create an inset axes with a given width and height.
+
+    Both sizes used can be specified either in inches or percentage.
+    For example,::
+
+        inset_axes(parent_axes, width='40%%', height='30%%', loc='lower left')
+
+    creates in inset axes in the lower left corner of *parent_axes* which spans
+    over 30%% in height and 40%% in width of the *parent_axes*. Since the usage
+    of `.inset_axes` may become slightly tricky when exceeding such standard
+    cases, it is recommended to read :doc:`the examples
+    </gallery/axes_grid1/inset_locator_demo>`.
+
+    Notes
+    -----
+    The meaning of *bbox_to_anchor* and *bbox_to_transform* is interpreted
+    differently from that of legend. The value of bbox_to_anchor
+    (or the return value of its get_points method; the default is
+    *parent_axes.bbox*) is transformed by the bbox_transform (the default
+    is Identity transform) and then interpreted as points in the pixel
+    coordinate (which is dpi dependent).
+
+    Thus, following three calls are identical and creates an inset axes
+    with respect to the *parent_axes*::
+
+       axins = inset_axes(parent_axes, "30%%", "40%%")
+       axins = inset_axes(parent_axes, "30%%", "40%%",
+                          bbox_to_anchor=parent_axes.bbox)
+       axins = inset_axes(parent_axes, "30%%", "40%%",
+                          bbox_to_anchor=(0, 0, 1, 1),
+                          bbox_transform=parent_axes.transAxes)
+
+    Parameters
+    ----------
+    parent_axes : `matplotlib.axes.Axes`
+        Axes to place the inset axes.
+
+    width, height : float or str
+        Size of the inset axes to create. If a float is provided, it is
+        the size in inches, e.g. *width=1.3*. If a string is provided, it is
+        the size in relative units, e.g. *width='40%%'*. By default, i.e. if
+        neither *bbox_to_anchor* nor *bbox_transform* are specified, those
+        are relative to the parent_axes. Otherwise, they are to be understood
+        relative to the bounding box provided via *bbox_to_anchor*.
+
+    loc : str, default: 'upper right'
+        Location to place the inset axes.  Valid locations are
+        'upper left', 'upper center', 'upper right',
+        'center left', 'center', 'center right',
+        'lower left', 'lower center', 'lower right'.
+        For backward compatibility, numeric values are accepted as well.
+        See the parameter *loc* of `.Legend` for details.
+
+    bbox_to_anchor : tuple or `~matplotlib.transforms.BboxBase`, optional
+        Bbox that the inset axes will be anchored to. If None,
+        a tuple of (0, 0, 1, 1) is used if *bbox_transform* is set
+        to *parent_axes.transAxes* or *parent_axes.figure.transFigure*.
+        Otherwise, *parent_axes.bbox* is used. If a tuple, can be either
+        [left, bottom, width, height], or [left, bottom].
+        If the kwargs *width* and/or *height* are specified in relative units,
+        the 2-tuple [left, bottom] cannot be used. Note that,
+        unless *bbox_transform* is set, the units of the bounding box
+        are interpreted in the pixel coordinate. When using *bbox_to_anchor*
+        with tuple, it almost always makes sense to also specify
+        a *bbox_transform*. This might often be the axes transform
+        *parent_axes.transAxes*.
+
+    bbox_transform : `~matplotlib.transforms.Transform`, optional
+        Transformation for the bbox that contains the inset axes.
+        If None, a `.transforms.IdentityTransform` is used. The value
+        of *bbox_to_anchor* (or the return value of its get_points method)
+        is transformed by the *bbox_transform* and then interpreted
+        as points in the pixel coordinate (which is dpi dependent).
+        You may provide *bbox_to_anchor* in some normalized coordinate,
+        and give an appropriate transform (e.g., *parent_axes.transAxes*).
+
+    axes_class : `~matplotlib.axes.Axes` type, default: `.HostAxes`
+        The type of the newly created inset axes.
+
+    axes_kwargs : dict, optional
+        Keyword arguments to pass to the constructor of the inset axes.
+        Valid arguments include:
+
+        %(Axes:kwdoc)s
+
+    borderpad : float, default: 0.5
+        Padding between inset axes and the bbox_to_anchor.
+        The units are axes font size, i.e. for a default font size of 10 points
+        *borderpad = 0.5* is equivalent to a padding of 5 points.
+
+    Returns
+    -------
+    inset_axes : *axes_class*
+        Inset axes object created.
+    """
+
+    if (bbox_transform in [parent_axes.transAxes, parent_axes.figure.transFigure]
+            and bbox_to_anchor is None):
+        _api.warn_external("Using the axes or figure transform requires a "
+                           "bounding box in the respective coordinates. "
+                           "Using bbox_to_anchor=(0, 0, 1, 1) now.")
+        bbox_to_anchor = (0, 0, 1, 1)
+    if bbox_to_anchor is None:
+        bbox_to_anchor = parent_axes.bbox
+    if (isinstance(bbox_to_anchor, tuple) and
+            (isinstance(width, str) or isinstance(height, str))):
+        if len(bbox_to_anchor) != 4:
+            raise ValueError("Using relative units for width or height "
+                             "requires to provide a 4-tuple or a "
+                             "`Bbox` instance to `bbox_to_anchor.")
+    return _add_inset_axes(
+        parent_axes, axes_class, axes_kwargs,
+        AnchoredSizeLocator(
+            bbox_to_anchor, width, height, loc=loc,
+            bbox_transform=bbox_transform, borderpad=borderpad))
+
+
+@_docstring.dedent_interpd
+def zoomed_inset_axes(parent_axes, zoom, loc='upper right',
+                      bbox_to_anchor=None, bbox_transform=None,
+                      axes_class=None, axes_kwargs=None,
+                      borderpad=0.5):
+    """
+    Create an anchored inset axes by scaling a parent axes. For usage, also see
+    :doc:`the examples </gallery/axes_grid1/inset_locator_demo2>`.
+
+    Parameters
+    ----------
+    parent_axes : `~matplotlib.axes.Axes`
+        Axes to place the inset axes.
+
+    zoom : float
+        Scaling factor of the data axes. *zoom* > 1 will enlarge the
+        coordinates (i.e., "zoomed in"), while *zoom* < 1 will shrink the
+        coordinates (i.e., "zoomed out").
+
+    loc : str, default: 'upper right'
+        Location to place the inset axes.  Valid locations are
+        'upper left', 'upper center', 'upper right',
+        'center left', 'center', 'center right',
+        'lower left', 'lower center', 'lower right'.
+        For backward compatibility, numeric values are accepted as well.
+        See the parameter *loc* of `.Legend` for details.
+
+    bbox_to_anchor : tuple or `~matplotlib.transforms.BboxBase`, optional
+        Bbox that the inset axes will be anchored to. If None,
+        *parent_axes.bbox* is used. If a tuple, can be either
+        [left, bottom, width, height], or [left, bottom].
+        If the kwargs *width* and/or *height* are specified in relative units,
+        the 2-tuple [left, bottom] cannot be used. Note that
+        the units of the bounding box are determined through the transform
+        in use. When using *bbox_to_anchor* it almost always makes sense to
+        also specify a *bbox_transform*. This might often be the axes transform
+        *parent_axes.transAxes*.
+
+    bbox_transform : `~matplotlib.transforms.Transform`, optional
+        Transformation for the bbox that contains the inset axes.
+        If None, a `.transforms.IdentityTransform` is used (i.e. pixel
+        coordinates). This is useful when not providing any argument to
+        *bbox_to_anchor*. When using *bbox_to_anchor* it almost always makes
+        sense to also specify a *bbox_transform*. This might often be the
+        axes transform *parent_axes.transAxes*. Inversely, when specifying
+        the axes- or figure-transform here, be aware that not specifying
+        *bbox_to_anchor* will use *parent_axes.bbox*, the units of which are
+        in display (pixel) coordinates.
+
+    axes_class : `~matplotlib.axes.Axes` type, default: `.HostAxes`
+        The type of the newly created inset axes.
+
+    axes_kwargs : dict, optional
+        Keyword arguments to pass to the constructor of the inset axes.
+        Valid arguments include:
+
+        %(Axes:kwdoc)s
+
+    borderpad : float, default: 0.5
+        Padding between inset axes and the bbox_to_anchor.
+        The units are axes font size, i.e. for a default font size of 10 points
+        *borderpad = 0.5* is equivalent to a padding of 5 points.
+
+    Returns
+    -------
+    inset_axes : *axes_class*
+        Inset axes object created.
+    """
+
+    return _add_inset_axes(
+        parent_axes, axes_class, axes_kwargs,
+        AnchoredZoomLocator(
+            parent_axes, zoom=zoom, loc=loc,
+            bbox_to_anchor=bbox_to_anchor, bbox_transform=bbox_transform,
+            borderpad=borderpad))
+
+
+class _TransformedBboxWithCallback(TransformedBbox):
+    """
+    Variant of `.TransformBbox` which calls *callback* before returning points.
+
+    Used by `.mark_inset` to unstale the parent axes' viewlim as needed.
+    """
+
+    def __init__(self, *args, callback, **kwargs):
+        super().__init__(*args, **kwargs)
+        self._callback = callback
+
+    def get_points(self):
+        self._callback()
+        return super().get_points()
+
+
+@_docstring.dedent_interpd
+def mark_inset(parent_axes, inset_axes, loc1, loc2, **kwargs):
+    """
+    Draw a box to mark the location of an area represented by an inset axes.
+
+    This function draws a box in *parent_axes* at the bounding box of
+    *inset_axes*, and shows a connection with the inset axes by drawing lines
+    at the corners, giving a "zoomed in" effect.
+
+    Parameters
+    ----------
+    parent_axes : `~matplotlib.axes.Axes`
+        Axes which contains the area of the inset axes.
+
+    inset_axes : `~matplotlib.axes.Axes`
+        The inset axes.
+
+    loc1, loc2 : {1, 2, 3, 4}
+        Corners to use for connecting the inset axes and the area in the
+        parent axes.
+
+    **kwargs
+        Patch properties for the lines and box drawn:
+
+        %(Patch:kwdoc)s
+
+    Returns
+    -------
+    pp : `~matplotlib.patches.Patch`
+        The patch drawn to represent the area of the inset axes.
+
+    p1, p2 : `~matplotlib.patches.Patch`
+        The patches connecting two corners of the inset axes and its area.
+    """
+    rect = _TransformedBboxWithCallback(
+        inset_axes.viewLim, parent_axes.transData,
+        callback=parent_axes._unstale_viewLim)
+
+    kwargs.setdefault("fill", bool({'fc', 'facecolor', 'color'}.intersection(kwargs)))
+    pp = BboxPatch(rect, **kwargs)
+    parent_axes.add_patch(pp)
+
+    p1 = BboxConnector(inset_axes.bbox, rect, loc1=loc1, **kwargs)
+    inset_axes.add_patch(p1)
+    p1.set_clip_on(False)
+    p2 = BboxConnector(inset_axes.bbox, rect, loc1=loc2, **kwargs)
+    inset_axes.add_patch(p2)
+    p2.set_clip_on(False)
+
+    return pp, p1, p2

rl/Lib/site-packages/mpl_toolkits/axes_grid1/mpl_axes.py

@@ -0,0 +1,128 @@
+import matplotlib.axes as maxes
+from matplotlib.artist import Artist
+from matplotlib.axis import XAxis, YAxis
+
+
+class SimpleChainedObjects:
+    def __init__(self, objects):
+        self._objects = objects
+
+    def __getattr__(self, k):
+        _a = SimpleChainedObjects([getattr(a, k) for a in self._objects])
+        return _a
+
+    def __call__(self, *args, **kwargs):
+        for m in self._objects:
+            m(*args, **kwargs)
+
+
+class Axes(maxes.Axes):
+
+    class AxisDict(dict):
+        def __init__(self, axes):
+            self.axes = axes
+            super().__init__()
+
+        def __getitem__(self, k):
+            if isinstance(k, tuple):
+                r = SimpleChainedObjects(
+                    # super() within a list comprehension needs explicit args.
+                    [super(Axes.AxisDict, self).__getitem__(k1) for k1 in k])
+                return r
+            elif isinstance(k, slice):
+                if k.start is None and k.stop is None and k.step is None:
+                    return SimpleChainedObjects(list(self.values()))
+                else:
+                    raise ValueError("Unsupported slice")
+            else:
+                return dict.__getitem__(self, k)
+
+        def __call__(self, *v, **kwargs):
+            return maxes.Axes.axis(self.axes, *v, **kwargs)
+
+    @property
+    def axis(self):
+        return self._axislines
+
+    def clear(self):
+        # docstring inherited
+        super().clear()
+        # Init axis artists.
+        self._axislines = self.AxisDict(self)
+        self._axislines.update(
+            bottom=SimpleAxisArtist(self.xaxis, 1, self.spines["bottom"]),
+            top=SimpleAxisArtist(self.xaxis, 2, self.spines["top"]),
+            left=SimpleAxisArtist(self.yaxis, 1, self.spines["left"]),
+            right=SimpleAxisArtist(self.yaxis, 2, self.spines["right"]))
+
+
+class SimpleAxisArtist(Artist):
+    def __init__(self, axis, axisnum, spine):
+        self._axis = axis
+        self._axisnum = axisnum
+        self.line = spine
+
+        if isinstance(axis, XAxis):
+            self._axis_direction = ["bottom", "top"][axisnum-1]
+        elif isinstance(axis, YAxis):
+            self._axis_direction = ["left", "right"][axisnum-1]
+        else:
+            raise ValueError(
+                f"axis must be instance of XAxis or YAxis, but got {axis}")
+        super().__init__()
+
+    @property
+    def major_ticks(self):
+        tickline = "tick%dline" % self._axisnum
+        return SimpleChainedObjects([getattr(tick, tickline)
+                                     for tick in self._axis.get_major_ticks()])
+
+    @property
+    def major_ticklabels(self):
+        label = "label%d" % self._axisnum
+        return SimpleChainedObjects([getattr(tick, label)
+                                     for tick in self._axis.get_major_ticks()])
+
+    @property
+    def label(self):
+        return self._axis.label
+
+    def set_visible(self, b):
+        self.toggle(all=b)
+        self.line.set_visible(b)
+        self._axis.set_visible(True)
+        super().set_visible(b)
+
+    def set_label(self, txt):
+        self._axis.set_label_text(txt)
+
+    def toggle(self, all=None, ticks=None, ticklabels=None, label=None):
+
+        if all:
+            _ticks, _ticklabels, _label = True, True, True
+        elif all is not None:
+            _ticks, _ticklabels, _label = False, False, False
+        else:
+            _ticks, _ticklabels, _label = None, None, None
+
+        if ticks is not None:
+            _ticks = ticks
+        if ticklabels is not None:
+            _ticklabels = ticklabels
+        if label is not None:
+            _label = label
+
+        if _ticks is not None:
+            tickparam = {f"tick{self._axisnum}On": _ticks}
+            self._axis.set_tick_params(**tickparam)
+        if _ticklabels is not None:
+            tickparam = {f"label{self._axisnum}On": _ticklabels}
+            self._axis.set_tick_params(**tickparam)
+
+        if _label is not None:
+            pos = self._axis.get_label_position()
+            if (pos == self._axis_direction) and not _label:
+                self._axis.label.set_visible(False)
+            elif _label:
+                self._axis.label.set_visible(True)
+                self._axis.set_label_position(self._axis_direction)

rl/Lib/site-packages/mpl_toolkits/axes_grid1/parasite_axes.py

@@ -0,0 +1,257 @@
+from matplotlib import _api, cbook
+import matplotlib.artist as martist
+import matplotlib.transforms as mtransforms
+from matplotlib.transforms import Bbox
+from .mpl_axes import Axes
+
+
+class ParasiteAxesBase:
+
+    def __init__(self, parent_axes, aux_transform=None,
+                 *, viewlim_mode=None, **kwargs):
+        self._parent_axes = parent_axes
+        self.transAux = aux_transform
+        self.set_viewlim_mode(viewlim_mode)
+        kwargs["frameon"] = False
+        super().__init__(parent_axes.figure, parent_axes._position, **kwargs)
+
+    def clear(self):
+        super().clear()
+        martist.setp(self.get_children(), visible=False)
+        self._get_lines = self._parent_axes._get_lines
+        self._parent_axes.callbacks._connect_picklable(
+            "xlim_changed", self._sync_lims)
+        self._parent_axes.callbacks._connect_picklable(
+            "ylim_changed", self._sync_lims)
+
+    def pick(self, mouseevent):
+        # This most likely goes to Artist.pick (depending on axes_class given
+        # to the factory), which only handles pick events registered on the
+        # axes associated with each child:
+        super().pick(mouseevent)
+        # But parasite axes are additionally given pick events from their host
+        # axes (cf. HostAxesBase.pick), which we handle here:
+        for a in self.get_children():
+            if (hasattr(mouseevent.inaxes, "parasites")
+                    and self in mouseevent.inaxes.parasites):
+                a.pick(mouseevent)
+
+    # aux_transform support
+
+    def _set_lim_and_transforms(self):
+        if self.transAux is not None:
+            self.transAxes = self._parent_axes.transAxes
+            self.transData = self.transAux + self._parent_axes.transData
+            self._xaxis_transform = mtransforms.blended_transform_factory(
+                self.transData, self.transAxes)
+            self._yaxis_transform = mtransforms.blended_transform_factory(
+                self.transAxes, self.transData)
+        else:
+            super()._set_lim_and_transforms()
+
+    def set_viewlim_mode(self, mode):
+        _api.check_in_list([None, "equal", "transform"], mode=mode)
+        self._viewlim_mode = mode
+
+    def get_viewlim_mode(self):
+        return self._viewlim_mode
+
+    def _sync_lims(self, parent):
+        viewlim = parent.viewLim.frozen()
+        mode = self.get_viewlim_mode()
+        if mode is None:
+            pass
+        elif mode == "equal":
+            self.viewLim.set(viewlim)
+        elif mode == "transform":
+            self.viewLim.set(viewlim.transformed(self.transAux.inverted()))
+        else:
+            _api.check_in_list([None, "equal", "transform"], mode=mode)
+
+    # end of aux_transform support
+
+
+parasite_axes_class_factory = cbook._make_class_factory(
+    ParasiteAxesBase, "{}Parasite")
+ParasiteAxes = parasite_axes_class_factory(Axes)
+
+
+class HostAxesBase:
+    def __init__(self, *args, **kwargs):
+        self.parasites = []
+        super().__init__(*args, **kwargs)
+
+    def get_aux_axes(
+            self, tr=None, viewlim_mode="equal", axes_class=None, **kwargs):
+        """
+        Add a parasite axes to this host.
+
+        Despite this method's name, this should actually be thought of as an
+        ``add_parasite_axes`` method.
+
+        .. versionchanged:: 3.7
+           Defaults to same base axes class as host axes.
+
+        Parameters
+        ----------
+        tr : `~matplotlib.transforms.Transform` or None, default: None
+            If a `.Transform`, the following relation will hold:
+            ``parasite.transData = tr + host.transData``.
+            If None, the parasite's and the host's ``transData`` are unrelated.
+        viewlim_mode : {"equal", "transform", None}, default: "equal"
+            How the parasite's view limits are set: directly equal to the
+            parent axes ("equal"), equal after application of *tr*
+            ("transform"), or independently (None).
+        axes_class : subclass type of `~matplotlib.axes.Axes`, optional
+            The `~.axes.Axes` subclass that is instantiated.  If None, the base
+            class of the host axes is used.
+        **kwargs
+            Other parameters are forwarded to the parasite axes constructor.
+        """
+        if axes_class is None:
+            axes_class = self._base_axes_class
+        parasite_axes_class = parasite_axes_class_factory(axes_class)
+        ax2 = parasite_axes_class(
+            self, tr, viewlim_mode=viewlim_mode, **kwargs)
+        # note that ax2.transData == tr + ax1.transData
+        # Anything you draw in ax2 will match the ticks and grids of ax1.
+        self.parasites.append(ax2)
+        ax2._remove_method = self.parasites.remove
+        return ax2
+
+    def draw(self, renderer):
+        orig_children_len = len(self._children)
+
+        locator = self.get_axes_locator()
+        if locator:
+            pos = locator(self, renderer)
+            self.set_position(pos, which="active")
+            self.apply_aspect(pos)
+        else:
+            self.apply_aspect()
+
+        rect = self.get_position()
+        for ax in self.parasites:
+            ax.apply_aspect(rect)
+            self._children.extend(ax.get_children())
+
+        super().draw(renderer)
+        del self._children[orig_children_len:]
+
+    def clear(self):
+        super().clear()
+        for ax in self.parasites:
+            ax.clear()
+
+    def pick(self, mouseevent):
+        super().pick(mouseevent)
+        # Also pass pick events on to parasite axes and, in turn, their
+        # children (cf. ParasiteAxesBase.pick)
+        for a in self.parasites:
+            a.pick(mouseevent)
+
+    def twinx(self, axes_class=None):
+        """
+        Create a twin of Axes with a shared x-axis but independent y-axis.
+
+        The y-axis of self will have ticks on the left and the returned axes
+        will have ticks on the right.
+        """
+        ax = self._add_twin_axes(axes_class, sharex=self)
+        self.axis["right"].set_visible(False)
+        ax.axis["right"].set_visible(True)
+        ax.axis["left", "top", "bottom"].set_visible(False)
+        return ax
+
+    def twiny(self, axes_class=None):
+        """
+        Create a twin of Axes with a shared y-axis but independent x-axis.
+
+        The x-axis of self will have ticks on the bottom and the returned axes
+        will have ticks on the top.
+        """
+        ax = self._add_twin_axes(axes_class, sharey=self)
+        self.axis["top"].set_visible(False)
+        ax.axis["top"].set_visible(True)
+        ax.axis["left", "right", "bottom"].set_visible(False)
+        return ax
+
+    def twin(self, aux_trans=None, axes_class=None):
+        """
+        Create a twin of Axes with no shared axis.
+
+        While self will have ticks on the left and bottom axis, the returned
+        axes will have ticks on the top and right axis.
+        """
+        if aux_trans is None:
+            aux_trans = mtransforms.IdentityTransform()
+        ax = self._add_twin_axes(
+            axes_class, aux_transform=aux_trans, viewlim_mode="transform")
+        self.axis["top", "right"].set_visible(False)
+        ax.axis["top", "right"].set_visible(True)
+        ax.axis["left", "bottom"].set_visible(False)
+        return ax
+
+    def _add_twin_axes(self, axes_class, **kwargs):
+        """
+        Helper for `.twinx`/`.twiny`/`.twin`.
+
+        *kwargs* are forwarded to the parasite axes constructor.
+        """
+        if axes_class is None:
+            axes_class = self._base_axes_class
+        ax = parasite_axes_class_factory(axes_class)(self, **kwargs)
+        self.parasites.append(ax)
+        ax._remove_method = self._remove_any_twin
+        return ax
+
+    def _remove_any_twin(self, ax):
+        self.parasites.remove(ax)
+        restore = ["top", "right"]
+        if ax._sharex:
+            restore.remove("top")
+        if ax._sharey:
+            restore.remove("right")
+        self.axis[tuple(restore)].set_visible(True)
+        self.axis[tuple(restore)].toggle(ticklabels=False, label=False)
+
+    @_api.make_keyword_only("3.8", "call_axes_locator")
+    def get_tightbbox(self, renderer=None, call_axes_locator=True,
+                      bbox_extra_artists=None):
+        bbs = [
+            *[ax.get_tightbbox(renderer, call_axes_locator=call_axes_locator)
+              for ax in self.parasites],
+            super().get_tightbbox(renderer,
+                                  call_axes_locator=call_axes_locator,
+                                  bbox_extra_artists=bbox_extra_artists)]
+        return Bbox.union([b for b in bbs if b.width != 0 or b.height != 0])
+
+
+host_axes_class_factory = host_subplot_class_factory = \
+    cbook._make_class_factory(HostAxesBase, "{}HostAxes", "_base_axes_class")
+HostAxes = SubplotHost = host_axes_class_factory(Axes)
+
+
+def host_axes(*args, axes_class=Axes, figure=None, **kwargs):
+    """
+    Create axes that can act as a hosts to parasitic axes.
+
+    Parameters
+    ----------
+    figure : `~matplotlib.figure.Figure`
+        Figure to which the axes will be added. Defaults to the current figure
+        `.pyplot.gcf()`.
+
+    *args, **kwargs
+        Will be passed on to the underlying `~.axes.Axes` object creation.
+    """
+    import matplotlib.pyplot as plt
+    host_axes_class = host_axes_class_factory(axes_class)
+    if figure is None:
+        figure = plt.gcf()
+    ax = host_axes_class(figure, *args, **kwargs)
+    figure.add_axes(ax)
+    return ax
+
+
+host_subplot = host_axes

rl/Lib/site-packages/mpl_toolkits/axes_grid1/tests/__init__.py

@@ -0,0 +1,10 @@
+from pathlib import Path
+
+
+# Check that the test directories exist
+if not (Path(__file__).parent / "baseline_images").exists():
+    raise OSError(
+        'The baseline image directory does not exist. '
+        'This is most likely because the test data is not installed. '
+        'You may need to install matplotlib from source to get the '
+        'test data.')

rl/Lib/site-packages/mpl_toolkits/axes_grid1/tests/conftest.py

@@ -0,0 +1,2 @@
+from matplotlib.testing.conftest import (mpl_test_settings,  # noqa
+                                         pytest_configure, pytest_unconfigure)

rl/Lib/site-packages/mpl_toolkits/axes_grid1/tests/test_axes_grid1.py

@@ -0,0 +1,792 @@
+from itertools import product
+import io
+import platform
+
+import matplotlib as mpl
+import matplotlib.pyplot as plt
+import matplotlib.ticker as mticker
+from matplotlib import cbook
+from matplotlib.backend_bases import MouseEvent
+from matplotlib.colors import LogNorm
+from matplotlib.patches import Circle, Ellipse
+from matplotlib.transforms import Bbox, TransformedBbox
+from matplotlib.testing.decorators import (
+    check_figures_equal, image_comparison, remove_ticks_and_titles)
+
+from mpl_toolkits.axes_grid1 import (
+    axes_size as Size,
+    host_subplot, make_axes_locatable,
+    Grid, AxesGrid, ImageGrid)
+from mpl_toolkits.axes_grid1.anchored_artists import (
+    AnchoredAuxTransformBox, AnchoredDrawingArea, AnchoredEllipse,
+    AnchoredDirectionArrows, AnchoredSizeBar)
+from mpl_toolkits.axes_grid1.axes_divider import (
+    Divider, HBoxDivider, make_axes_area_auto_adjustable, SubplotDivider,
+    VBoxDivider)
+from mpl_toolkits.axes_grid1.axes_rgb import RGBAxes
+from mpl_toolkits.axes_grid1.inset_locator import (
+    zoomed_inset_axes, mark_inset, inset_axes, BboxConnectorPatch,
+    InsetPosition)
+import mpl_toolkits.axes_grid1.mpl_axes
+import pytest
+
+import numpy as np
+from numpy.testing import assert_array_equal, assert_array_almost_equal
+
+
+def test_divider_append_axes():
+    fig, ax = plt.subplots()
+    divider = make_axes_locatable(ax)
+    axs = {
+        "main": ax,
+        "top": divider.append_axes("top", 1.2, pad=0.1, sharex=ax),
+        "bottom": divider.append_axes("bottom", 1.2, pad=0.1, sharex=ax),
+        "left": divider.append_axes("left", 1.2, pad=0.1, sharey=ax),
+        "right": divider.append_axes("right", 1.2, pad=0.1, sharey=ax),
+    }
+    fig.canvas.draw()
+    bboxes = {k: axs[k].get_window_extent() for k in axs}
+    dpi = fig.dpi
+    assert bboxes["top"].height == pytest.approx(1.2 * dpi)
+    assert bboxes["bottom"].height == pytest.approx(1.2 * dpi)
+    assert bboxes["left"].width == pytest.approx(1.2 * dpi)
+    assert bboxes["right"].width == pytest.approx(1.2 * dpi)
+    assert bboxes["top"].y0 - bboxes["main"].y1 == pytest.approx(0.1 * dpi)
+    assert bboxes["main"].y0 - bboxes["bottom"].y1 == pytest.approx(0.1 * dpi)
+    assert bboxes["main"].x0 - bboxes["left"].x1 == pytest.approx(0.1 * dpi)
+    assert bboxes["right"].x0 - bboxes["main"].x1 == pytest.approx(0.1 * dpi)
+    assert bboxes["left"].y0 == bboxes["main"].y0 == bboxes["right"].y0
+    assert bboxes["left"].y1 == bboxes["main"].y1 == bboxes["right"].y1
+    assert bboxes["top"].x0 == bboxes["main"].x0 == bboxes["bottom"].x0
+    assert bboxes["top"].x1 == bboxes["main"].x1 == bboxes["bottom"].x1
+
+
+# Update style when regenerating the test image
+@image_comparison(['twin_axes_empty_and_removed'], extensions=["png"], tol=1,
+                  style=('classic', '_classic_test_patch'))
+def test_twin_axes_empty_and_removed():
+    # Purely cosmetic font changes (avoid overlap)
+    mpl.rcParams.update(
+        {"font.size": 8, "xtick.labelsize": 8, "ytick.labelsize": 8})
+    generators = ["twinx", "twiny", "twin"]
+    modifiers = ["", "host invisible", "twin removed", "twin invisible",
+                 "twin removed\nhost invisible"]
+    # Unmodified host subplot at the beginning for reference
+    h = host_subplot(len(modifiers)+1, len(generators), 2)
+    h.text(0.5, 0.5, "host_subplot",
+           horizontalalignment="center", verticalalignment="center")
+    # Host subplots with various modifications (twin*, visibility) applied
+    for i, (mod, gen) in enumerate(product(modifiers, generators),
+                                   len(generators) + 1):
+        h = host_subplot(len(modifiers)+1, len(generators), i)
+        t = getattr(h, gen)()
+        if "twin invisible" in mod:
+            t.axis[:].set_visible(False)
+        if "twin removed" in mod:
+            t.remove()
+        if "host invisible" in mod:
+            h.axis[:].set_visible(False)
+        h.text(0.5, 0.5, gen + ("\n" + mod if mod else ""),
+               horizontalalignment="center", verticalalignment="center")
+    plt.subplots_adjust(wspace=0.5, hspace=1)
+
+
+def test_twin_axes_both_with_units():
+    host = host_subplot(111)
+    with pytest.warns(mpl.MatplotlibDeprecationWarning):
+        host.plot_date([0, 1, 2], [0, 1, 2], xdate=False, ydate=True)
+    twin = host.twinx()
+    twin.plot(["a", "b", "c"])
+    assert host.get_yticklabels()[0].get_text() == "00:00:00"
+    assert twin.get_yticklabels()[0].get_text() == "a"
+
+
+def test_axesgrid_colorbar_log_smoketest():
+    fig = plt.figure()
+    grid = AxesGrid(fig, 111,  # modified to be only subplot
+                    nrows_ncols=(1, 1),
+                    ngrids=1,
+                    label_mode="L",
+                    cbar_location="top",
+                    cbar_mode="single",
+                    )
+
+    Z = 10000 * np.random.rand(10, 10)
+    im = grid[0].imshow(Z, interpolation="nearest", norm=LogNorm())
+
+    grid.cbar_axes[0].colorbar(im)
+
+
+def test_inset_colorbar_tight_layout_smoketest():
+    fig, ax = plt.subplots(1, 1)
+    pts = ax.scatter([0, 1], [0, 1], c=[1, 5])
+
+    cax = inset_axes(ax, width="3%", height="70%")
+    plt.colorbar(pts, cax=cax)
+
+    with pytest.warns(UserWarning, match="This figure includes Axes"):
+        # Will warn, but not raise an error
+        plt.tight_layout()
+
+
+@image_comparison(['inset_locator.png'], style='default', remove_text=True)
+def test_inset_locator():
+    fig, ax = plt.subplots(figsize=[5, 4])
+
+    # prepare the demo image
+    # Z is a 15x15 array
+    Z = cbook.get_sample_data("axes_grid/bivariate_normal.npy")
+    extent = (-3, 4, -4, 3)
+    Z2 = np.zeros((150, 150))
+    ny, nx = Z.shape
+    Z2[30:30+ny, 30:30+nx] = Z
+
+    ax.imshow(Z2, extent=extent, interpolation="nearest",
+              origin="lower")
+
+    axins = zoomed_inset_axes(ax, zoom=6, loc='upper right')
+    axins.imshow(Z2, extent=extent, interpolation="nearest",
+                 origin="lower")
+    axins.yaxis.get_major_locator().set_params(nbins=7)
+    axins.xaxis.get_major_locator().set_params(nbins=7)
+    # sub region of the original image
+    x1, x2, y1, y2 = -1.5, -0.9, -2.5, -1.9
+    axins.set_xlim(x1, x2)
+    axins.set_ylim(y1, y2)
+
+    plt.xticks(visible=False)
+    plt.yticks(visible=False)
+
+    # draw a bbox of the region of the inset axes in the parent axes and
+    # connecting lines between the bbox and the inset axes area
+    mark_inset(ax, axins, loc1=2, loc2=4, fc="none", ec="0.5")
+
+    asb = AnchoredSizeBar(ax.transData,
+                          0.5,
+                          '0.5',
+                          loc='lower center',
+                          pad=0.1, borderpad=0.5, sep=5,
+                          frameon=False)
+    ax.add_artist(asb)
+
+
+@image_comparison(['inset_axes.png'], style='default', remove_text=True)
+def test_inset_axes():
+    fig, ax = plt.subplots(figsize=[5, 4])
+
+    # prepare the demo image
+    # Z is a 15x15 array
+    Z = cbook.get_sample_data("axes_grid/bivariate_normal.npy")
+    extent = (-3, 4, -4, 3)
+    Z2 = np.zeros((150, 150))
+    ny, nx = Z.shape
+    Z2[30:30+ny, 30:30+nx] = Z
+
+    ax.imshow(Z2, extent=extent, interpolation="nearest",
+              origin="lower")
+
+    # creating our inset axes with a bbox_transform parameter
+    axins = inset_axes(ax, width=1., height=1., bbox_to_anchor=(1, 1),
+                       bbox_transform=ax.transAxes)
+
+    axins.imshow(Z2, extent=extent, interpolation="nearest",
+                 origin="lower")
+    axins.yaxis.get_major_locator().set_params(nbins=7)
+    axins.xaxis.get_major_locator().set_params(nbins=7)
+    # sub region of the original image
+    x1, x2, y1, y2 = -1.5, -0.9, -2.5, -1.9
+    axins.set_xlim(x1, x2)
+    axins.set_ylim(y1, y2)
+
+    plt.xticks(visible=False)
+    plt.yticks(visible=False)
+
+    # draw a bbox of the region of the inset axes in the parent axes and
+    # connecting lines between the bbox and the inset axes area
+    mark_inset(ax, axins, loc1=2, loc2=4, fc="none", ec="0.5")
+
+    asb = AnchoredSizeBar(ax.transData,
+                          0.5,
+                          '0.5',
+                          loc='lower center',
+                          pad=0.1, borderpad=0.5, sep=5,
+                          frameon=False)
+    ax.add_artist(asb)
+
+
+def test_inset_axes_complete():
+    dpi = 100
+    figsize = (6, 5)
+    fig, ax = plt.subplots(figsize=figsize, dpi=dpi)
+    fig.subplots_adjust(.1, .1, .9, .9)
+
+    ins = inset_axes(ax, width=2., height=2., borderpad=0)
+    fig.canvas.draw()
+    assert_array_almost_equal(
+        ins.get_position().extents,
+        [(0.9*figsize[0]-2.)/figsize[0], (0.9*figsize[1]-2.)/figsize[1],
+         0.9, 0.9])
+
+    ins = inset_axes(ax, width="40%", height="30%", borderpad=0)
+    fig.canvas.draw()
+    assert_array_almost_equal(
+        ins.get_position().extents, [.9-.8*.4, .9-.8*.3, 0.9, 0.9])
+
+    ins = inset_axes(ax, width=1., height=1.2, bbox_to_anchor=(200, 100),
+                     loc=3, borderpad=0)
+    fig.canvas.draw()
+    assert_array_almost_equal(
+        ins.get_position().extents,
+        [200/dpi/figsize[0], 100/dpi/figsize[1],
+         (200/dpi+1)/figsize[0], (100/dpi+1.2)/figsize[1]])
+
+    ins1 = inset_axes(ax, width="35%", height="60%", loc=3, borderpad=1)
+    ins2 = inset_axes(ax, width="100%", height="100%",
+                      bbox_to_anchor=(0, 0, .35, .60),
+                      bbox_transform=ax.transAxes, loc=3, borderpad=1)
+    fig.canvas.draw()
+    assert_array_equal(ins1.get_position().extents,
+                       ins2.get_position().extents)
+
+    with pytest.raises(ValueError):
+        ins = inset_axes(ax, width="40%", height="30%",
+                         bbox_to_anchor=(0.4, 0.5))
+
+    with pytest.warns(UserWarning):
+        ins = inset_axes(ax, width="40%", height="30%",
+                         bbox_transform=ax.transAxes)
+
+
+def test_inset_axes_tight():
+    # gh-26287 found that inset_axes raised with bbox_inches=tight
+    fig, ax = plt.subplots()
+    inset_axes(ax, width=1.3, height=0.9)
+
+    f = io.BytesIO()
+    fig.savefig(f, bbox_inches="tight")
+
+
+@image_comparison(['fill_facecolor.png'], remove_text=True, style='mpl20')
+def test_fill_facecolor():
+    fig, ax = plt.subplots(1, 5)
+    fig.set_size_inches(5, 5)
+    for i in range(1, 4):
+        ax[i].yaxis.set_visible(False)
+    ax[4].yaxis.tick_right()
+    bbox = Bbox.from_extents(0, 0.4, 1, 0.6)
+
+    # fill with blue by setting 'fc' field
+    bbox1 = TransformedBbox(bbox, ax[0].transData)
+    bbox2 = TransformedBbox(bbox, ax[1].transData)
+    # set color to BboxConnectorPatch
+    p = BboxConnectorPatch(
+        bbox1, bbox2, loc1a=1, loc2a=2, loc1b=4, loc2b=3,
+        ec="r", fc="b")
+    p.set_clip_on(False)
+    ax[0].add_patch(p)
+    # set color to marked area
+    axins = zoomed_inset_axes(ax[0], 1, loc='upper right')
+    axins.set_xlim(0, 0.2)
+    axins.set_ylim(0, 0.2)
+    plt.gca().axes.xaxis.set_ticks([])
+    plt.gca().axes.yaxis.set_ticks([])
+    mark_inset(ax[0], axins, loc1=2, loc2=4, fc="b", ec="0.5")
+
+    # fill with yellow by setting 'facecolor' field
+    bbox3 = TransformedBbox(bbox, ax[1].transData)
+    bbox4 = TransformedBbox(bbox, ax[2].transData)
+    # set color to BboxConnectorPatch
+    p = BboxConnectorPatch(
+        bbox3, bbox4, loc1a=1, loc2a=2, loc1b=4, loc2b=3,
+        ec="r", facecolor="y")
+    p.set_clip_on(False)
+    ax[1].add_patch(p)
+    # set color to marked area
+    axins = zoomed_inset_axes(ax[1], 1, loc='upper right')
+    axins.set_xlim(0, 0.2)
+    axins.set_ylim(0, 0.2)
+    plt.gca().axes.xaxis.set_ticks([])
+    plt.gca().axes.yaxis.set_ticks([])
+    mark_inset(ax[1], axins, loc1=2, loc2=4, facecolor="y", ec="0.5")
+
+    # fill with green by setting 'color' field
+    bbox5 = TransformedBbox(bbox, ax[2].transData)
+    bbox6 = TransformedBbox(bbox, ax[3].transData)
+    # set color to BboxConnectorPatch
+    p = BboxConnectorPatch(
+        bbox5, bbox6, loc1a=1, loc2a=2, loc1b=4, loc2b=3,
+        ec="r", color="g")
+    p.set_clip_on(False)
+    ax[2].add_patch(p)
+    # set color to marked area
+    axins = zoomed_inset_axes(ax[2], 1, loc='upper right')
+    axins.set_xlim(0, 0.2)
+    axins.set_ylim(0, 0.2)
+    plt.gca().axes.xaxis.set_ticks([])
+    plt.gca().axes.yaxis.set_ticks([])
+    mark_inset(ax[2], axins, loc1=2, loc2=4, color="g", ec="0.5")
+
+    # fill with green but color won't show if set fill to False
+    bbox7 = TransformedBbox(bbox, ax[3].transData)
+    bbox8 = TransformedBbox(bbox, ax[4].transData)
+    # BboxConnectorPatch won't show green
+    p = BboxConnectorPatch(
+        bbox7, bbox8, loc1a=1, loc2a=2, loc1b=4, loc2b=3,
+        ec="r", fc="g", fill=False)
+    p.set_clip_on(False)
+    ax[3].add_patch(p)
+    # marked area won't show green
+    axins = zoomed_inset_axes(ax[3], 1, loc='upper right')
+    axins.set_xlim(0, 0.2)
+    axins.set_ylim(0, 0.2)
+    axins.xaxis.set_ticks([])
+    axins.yaxis.set_ticks([])
+    mark_inset(ax[3], axins, loc1=2, loc2=4, fc="g", ec="0.5", fill=False)
+
+
+# Update style when regenerating the test image
+@image_comparison(['zoomed_axes.png', 'inverted_zoomed_axes.png'],
+                  style=('classic', '_classic_test_patch'),
+                  tol=0.02 if platform.machine() == 'arm64' else 0)
+def test_zooming_with_inverted_axes():
+    fig, ax = plt.subplots()
+    ax.plot([1, 2, 3], [1, 2, 3])
+    ax.axis([1, 3, 1, 3])
+    inset_ax = zoomed_inset_axes(ax, zoom=2.5, loc='lower right')
+    inset_ax.axis([1.1, 1.4, 1.1, 1.4])
+
+    fig, ax = plt.subplots()
+    ax.plot([1, 2, 3], [1, 2, 3])
+    ax.axis([3, 1, 3, 1])
+    inset_ax = zoomed_inset_axes(ax, zoom=2.5, loc='lower right')
+    inset_ax.axis([1.4, 1.1, 1.4, 1.1])
+
+
+# Update style when regenerating the test image
+@image_comparison(['anchored_direction_arrows.png'],
+                  tol=0 if platform.machine() == 'x86_64' else 0.01,
+                  style=('classic', '_classic_test_patch'))
+def test_anchored_direction_arrows():
+    fig, ax = plt.subplots()
+    ax.imshow(np.zeros((10, 10)), interpolation='nearest')
+
+    simple_arrow = AnchoredDirectionArrows(ax.transAxes, 'X', 'Y')
+    ax.add_artist(simple_arrow)
+
+
+# Update style when regenerating the test image
+@image_comparison(['anchored_direction_arrows_many_args.png'],
+                  style=('classic', '_classic_test_patch'))
+def test_anchored_direction_arrows_many_args():
+    fig, ax = plt.subplots()
+    ax.imshow(np.ones((10, 10)))
+
+    direction_arrows = AnchoredDirectionArrows(
+            ax.transAxes, 'A', 'B', loc='upper right', color='red',
+            aspect_ratio=-0.5, pad=0.6, borderpad=2, frameon=True, alpha=0.7,
+            sep_x=-0.06, sep_y=-0.08, back_length=0.1, head_width=9,
+            head_length=10, tail_width=5)
+    ax.add_artist(direction_arrows)
+
+
+def test_axes_locatable_position():
+    fig, ax = plt.subplots()
+    divider = make_axes_locatable(ax)
+    with mpl.rc_context({"figure.subplot.wspace": 0.02}):
+        cax = divider.append_axes('right', size='5%')
+    fig.canvas.draw()
+    assert np.isclose(cax.get_position(original=False).width,
+                      0.03621495327102808)
+
+
+@image_comparison(['image_grid_each_left_label_mode_all.png'], style='mpl20',
+                  savefig_kwarg={'bbox_inches': 'tight'})
+def test_image_grid_each_left_label_mode_all():
+    imdata = np.arange(100).reshape((10, 10))
+
+    fig = plt.figure(1, (3, 3))
+    grid = ImageGrid(fig, (1, 1, 1), nrows_ncols=(3, 2), axes_pad=(0.5, 0.3),
+                     cbar_mode="each", cbar_location="left", cbar_size="15%",
+                     label_mode="all")
+    # 3-tuple rect => SubplotDivider
+    assert isinstance(grid.get_divider(), SubplotDivider)
+    assert grid.get_axes_pad() == (0.5, 0.3)
+    assert grid.get_aspect()  # True by default for ImageGrid
+    for ax, cax in zip(grid, grid.cbar_axes):
+        im = ax.imshow(imdata, interpolation='none')
+        cax.colorbar(im)
+
+
+@image_comparison(['image_grid_single_bottom_label_mode_1.png'], style='mpl20',
+                  savefig_kwarg={'bbox_inches': 'tight'})
+def test_image_grid_single_bottom():
+    imdata = np.arange(100).reshape((10, 10))
+
+    fig = plt.figure(1, (2.5, 1.5))
+    grid = ImageGrid(fig, (0, 0, 1, 1), nrows_ncols=(1, 3),
+                     axes_pad=(0.2, 0.15), cbar_mode="single",
+                     cbar_location="bottom", cbar_size="10%", label_mode="1")
+    # 4-tuple rect => Divider, isinstance will give True for SubplotDivider
+    assert type(grid.get_divider()) is Divider
+    for i in range(3):
+        im = grid[i].imshow(imdata, interpolation='none')
+    grid.cbar_axes[0].colorbar(im)
+
+
+def test_image_grid_label_mode_invalid():
+    fig = plt.figure()
+    with pytest.raises(ValueError, match="'foo' is not a valid value for mode"):
+        ImageGrid(fig, (0, 0, 1, 1), (2, 1), label_mode="foo")
+
+
+@image_comparison(['image_grid.png'],
+                  remove_text=True, style='mpl20',
+                  savefig_kwarg={'bbox_inches': 'tight'})
+def test_image_grid():
+    # test that image grid works with bbox_inches=tight.
+    im = np.arange(100).reshape((10, 10))
+
+    fig = plt.figure(1, (4, 4))
+    grid = ImageGrid(fig, 111, nrows_ncols=(2, 2), axes_pad=0.1)
+    assert grid.get_axes_pad() == (0.1, 0.1)
+    for i in range(4):
+        grid[i].imshow(im, interpolation='nearest')
+
+
+def test_gettightbbox():
+    fig, ax = plt.subplots(figsize=(8, 6))
+
+    l, = ax.plot([1, 2, 3], [0, 1, 0])
+
+    ax_zoom = zoomed_inset_axes(ax, 4)
+    ax_zoom.plot([1, 2, 3], [0, 1, 0])
+
+    mark_inset(ax, ax_zoom, loc1=1, loc2=3, fc="none", ec='0.3')
+
+    remove_ticks_and_titles(fig)
+    bbox = fig.get_tightbbox(fig.canvas.get_renderer())
+    np.testing.assert_array_almost_equal(bbox.extents,
+                                         [-17.7, -13.9, 7.2, 5.4])
+
+
+@pytest.mark.parametrize("click_on", ["big", "small"])
+@pytest.mark.parametrize("big_on_axes,small_on_axes", [
+    ("gca", "gca"),
+    ("host", "host"),
+    ("host", "parasite"),
+    ("parasite", "host"),
+    ("parasite", "parasite")
+])
+def test_picking_callbacks_overlap(big_on_axes, small_on_axes, click_on):
+    """Test pick events on normal, host or parasite axes."""
+    # Two rectangles are drawn and "clicked on", a small one and a big one
+    # enclosing the small one. The axis on which they are drawn as well as the
+    # rectangle that is clicked on are varied.
+    # In each case we expect that both rectangles are picked if we click on the
+    # small one and only the big one is picked if we click on the big one.
+    # Also tests picking on normal axes ("gca") as a control.
+    big = plt.Rectangle((0.25, 0.25), 0.5, 0.5, picker=5)
+    small = plt.Rectangle((0.4, 0.4), 0.2, 0.2, facecolor="r", picker=5)
+    # Machinery for "receiving" events
+    received_events = []
+    def on_pick(event):
+        received_events.append(event)
+    plt.gcf().canvas.mpl_connect('pick_event', on_pick)
+    # Shortcut
+    rectangles_on_axes = (big_on_axes, small_on_axes)
+    # Axes setup
+    axes = {"gca": None, "host": None, "parasite": None}
+    if "gca" in rectangles_on_axes:
+        axes["gca"] = plt.gca()
+    if "host" in rectangles_on_axes or "parasite" in rectangles_on_axes:
+        axes["host"] = host_subplot(111)
+        axes["parasite"] = axes["host"].twin()
+    # Add rectangles to axes
+    axes[big_on_axes].add_patch(big)
+    axes[small_on_axes].add_patch(small)
+    # Simulate picking with click mouse event
+    if click_on == "big":
+        click_axes = axes[big_on_axes]
+        axes_coords = (0.3, 0.3)
+    else:
+        click_axes = axes[small_on_axes]
+        axes_coords = (0.5, 0.5)
+    # In reality mouse events never happen on parasite axes, only host axes
+    if click_axes is axes["parasite"]:
+        click_axes = axes["host"]
+    (x, y) = click_axes.transAxes.transform(axes_coords)
+    m = MouseEvent("button_press_event", click_axes.figure.canvas, x, y,
+                   button=1)
+    click_axes.pick(m)
+    # Checks
+    expected_n_events = 2 if click_on == "small" else 1
+    assert len(received_events) == expected_n_events
+    event_rects = [event.artist for event in received_events]
+    assert big in event_rects
+    if click_on == "small":
+        assert small in event_rects
+
+
+@image_comparison(['anchored_artists.png'], remove_text=True, style='mpl20')
+def test_anchored_artists():
+    fig, ax = plt.subplots(figsize=(3, 3))
+    ada = AnchoredDrawingArea(40, 20, 0, 0, loc='upper right', pad=0.,
+                              frameon=False)
+    p1 = Circle((10, 10), 10)
+    ada.drawing_area.add_artist(p1)
+    p2 = Circle((30, 10), 5, fc="r")
+    ada.drawing_area.add_artist(p2)
+    ax.add_artist(ada)
+
+    box = AnchoredAuxTransformBox(ax.transData, loc='upper left')
+    el = Ellipse((0, 0), width=0.1, height=0.4, angle=30, color='cyan')
+    box.drawing_area.add_artist(el)
+    ax.add_artist(box)
+
+    # Manually construct the ellipse instead, once the deprecation elapses.
+    with pytest.warns(mpl.MatplotlibDeprecationWarning):
+        ae = AnchoredEllipse(ax.transData, width=0.1, height=0.25, angle=-60,
+                             loc='lower left', pad=0.5, borderpad=0.4,
+                             frameon=True)
+    ax.add_artist(ae)
+
+    asb = AnchoredSizeBar(ax.transData, 0.2, r"0.2 units", loc='lower right',
+                          pad=0.3, borderpad=0.4, sep=4, fill_bar=True,
+                          frameon=False, label_top=True, prop={'size': 20},
+                          size_vertical=0.05, color='green')
+    ax.add_artist(asb)
+
+
+def test_hbox_divider():
+    arr1 = np.arange(20).reshape((4, 5))
+    arr2 = np.arange(20).reshape((5, 4))
+
+    fig, (ax1, ax2) = plt.subplots(1, 2)
+    ax1.imshow(arr1)
+    ax2.imshow(arr2)
+
+    pad = 0.5  # inches.
+    divider = HBoxDivider(
+        fig, 111,  # Position of combined axes.
+        horizontal=[Size.AxesX(ax1), Size.Fixed(pad), Size.AxesX(ax2)],
+        vertical=[Size.AxesY(ax1), Size.Scaled(1), Size.AxesY(ax2)])
+    ax1.set_axes_locator(divider.new_locator(0))
+    ax2.set_axes_locator(divider.new_locator(2))
+
+    fig.canvas.draw()
+    p1 = ax1.get_position()
+    p2 = ax2.get_position()
+    assert p1.height == p2.height
+    assert p2.width / p1.width == pytest.approx((4 / 5) ** 2)
+
+
+def test_vbox_divider():
+    arr1 = np.arange(20).reshape((4, 5))
+    arr2 = np.arange(20).reshape((5, 4))
+
+    fig, (ax1, ax2) = plt.subplots(1, 2)
+    ax1.imshow(arr1)
+    ax2.imshow(arr2)
+
+    pad = 0.5  # inches.
+    divider = VBoxDivider(
+        fig, 111,  # Position of combined axes.
+        horizontal=[Size.AxesX(ax1), Size.Scaled(1), Size.AxesX(ax2)],
+        vertical=[Size.AxesY(ax1), Size.Fixed(pad), Size.AxesY(ax2)])
+    ax1.set_axes_locator(divider.new_locator(0))
+    ax2.set_axes_locator(divider.new_locator(2))
+
+    fig.canvas.draw()
+    p1 = ax1.get_position()
+    p2 = ax2.get_position()
+    assert p1.width == p2.width
+    assert p1.height / p2.height == pytest.approx((4 / 5) ** 2)
+
+
+def test_axes_class_tuple():
+    fig = plt.figure()
+    axes_class = (mpl_toolkits.axes_grid1.mpl_axes.Axes, {})
+    gr = AxesGrid(fig, 111, nrows_ncols=(1, 1), axes_class=axes_class)
+
+
+def test_grid_axes_lists():
+    """Test Grid axes_all, axes_row and axes_column relationship."""
+    fig = plt.figure()
+    grid = Grid(fig, 111, (2, 3), direction="row")
+    assert_array_equal(grid, grid.axes_all)
+    assert_array_equal(grid.axes_row, np.transpose(grid.axes_column))
+    assert_array_equal(grid, np.ravel(grid.axes_row), "row")
+    assert grid.get_geometry() == (2, 3)
+    grid = Grid(fig, 111, (2, 3), direction="column")
+    assert_array_equal(grid, np.ravel(grid.axes_column), "column")
+
+
+@pytest.mark.parametrize('direction', ('row', 'column'))
+def test_grid_axes_position(direction):
+    """Test positioning of the axes in Grid."""
+    fig = plt.figure()
+    grid = Grid(fig, 111, (2, 2), direction=direction)
+    loc = [ax.get_axes_locator() for ax in np.ravel(grid.axes_row)]
+    # Test nx.
+    assert loc[1].args[0] > loc[0].args[0]
+    assert loc[0].args[0] == loc[2].args[0]
+    assert loc[3].args[0] == loc[1].args[0]
+    # Test ny.
+    assert loc[2].args[1] < loc[0].args[1]
+    assert loc[0].args[1] == loc[1].args[1]
+    assert loc[3].args[1] == loc[2].args[1]
+
+
+@pytest.mark.parametrize('rect, ngrids, error, message', (
+    ((1, 1), None, TypeError, "Incorrect rect format"),
+    (111, -1, ValueError, "ngrids must be positive"),
+    (111, 7, ValueError, "ngrids must be positive"),
+))
+def test_grid_errors(rect, ngrids, error, message):
+    fig = plt.figure()
+    with pytest.raises(error, match=message):
+        Grid(fig, rect, (2, 3), ngrids=ngrids)
+
+
+@pytest.mark.parametrize('anchor, error, message', (
+    (None, TypeError, "anchor must be str"),
+    ("CC", ValueError, "'CC' is not a valid value for anchor"),
+    ((1, 1, 1), TypeError, "anchor must be str"),
+))
+def test_divider_errors(anchor, error, message):
+    fig = plt.figure()
+    with pytest.raises(error, match=message):
+        Divider(fig, [0, 0, 1, 1], [Size.Fixed(1)], [Size.Fixed(1)],
+                anchor=anchor)
+
+
+@check_figures_equal(extensions=["png"])
+def test_mark_inset_unstales_viewlim(fig_test, fig_ref):
+    inset, full = fig_test.subplots(1, 2)
+    full.plot([0, 5], [0, 5])
+    inset.set(xlim=(1, 2), ylim=(1, 2))
+    # Check that mark_inset unstales full's viewLim before drawing the marks.
+    mark_inset(full, inset, 1, 4)
+
+    inset, full = fig_ref.subplots(1, 2)
+    full.plot([0, 5], [0, 5])
+    inset.set(xlim=(1, 2), ylim=(1, 2))
+    mark_inset(full, inset, 1, 4)
+    # Manually unstale the full's viewLim.
+    fig_ref.canvas.draw()
+
+
+def test_auto_adjustable():
+    fig = plt.figure()
+    ax = fig.add_axes([0, 0, 1, 1])
+    pad = 0.1
+    make_axes_area_auto_adjustable(ax, pad=pad)
+    fig.canvas.draw()
+    tbb = ax.get_tightbbox()
+    assert tbb.x0 == pytest.approx(pad * fig.dpi)
+    assert tbb.x1 == pytest.approx(fig.bbox.width - pad * fig.dpi)
+    assert tbb.y0 == pytest.approx(pad * fig.dpi)
+    assert tbb.y1 == pytest.approx(fig.bbox.height - pad * fig.dpi)
+
+
+# Update style when regenerating the test image
+@image_comparison(['rgb_axes.png'], remove_text=True,
+                  style=('classic', '_classic_test_patch'))
+def test_rgb_axes():
+    fig = plt.figure()
+    ax = RGBAxes(fig, (0.1, 0.1, 0.8, 0.8), pad=0.1)
+    rng = np.random.default_rng(19680801)
+    r = rng.random((5, 5))
+    g = rng.random((5, 5))
+    b = rng.random((5, 5))
+    ax.imshow_rgb(r, g, b, interpolation='none')
+
+
+# Update style when regenerating the test image
+@image_comparison(['insetposition.png'], remove_text=True,
+                  style=('classic', '_classic_test_patch'))
+def test_insetposition():
+    fig, ax = plt.subplots(figsize=(2, 2))
+    ax_ins = plt.axes([0, 0, 1, 1])
+    with pytest.warns(mpl.MatplotlibDeprecationWarning):
+        ip = InsetPosition(ax, [0.2, 0.25, 0.5, 0.4])
+    ax_ins.set_axes_locator(ip)
+
+
+# The original version of this test relied on mpl_toolkits's slightly different
+# colorbar implementation; moving to matplotlib's own colorbar implementation
+# caused the small image comparison error.
+@image_comparison(['imagegrid_cbar_mode.png'],
+                  remove_text=True, style='mpl20', tol=0.3)
+def test_imagegrid_cbar_mode_edge():
+    arr = np.arange(16).reshape((4, 4))
+
+    fig = plt.figure(figsize=(18, 9))
+
+    positions = (241, 242, 243, 244, 245, 246, 247, 248)
+    directions = ['row']*4 + ['column']*4
+    cbar_locations = ['left', 'right', 'top', 'bottom']*2
+
+    for position, direction, location in zip(
+            positions, directions, cbar_locations):
+        grid = ImageGrid(fig, position,
+                         nrows_ncols=(2, 2),
+                         direction=direction,
+                         cbar_location=location,
+                         cbar_size='20%',
+                         cbar_mode='edge')
+        ax1, ax2, ax3, ax4 = grid
+
+        ax1.imshow(arr, cmap='nipy_spectral')
+        ax2.imshow(arr.T, cmap='hot')
+        ax3.imshow(np.hypot(arr, arr.T), cmap='jet')
+        ax4.imshow(np.arctan2(arr, arr.T), cmap='hsv')
+
+        # In each row/column, the "first" colorbars must be overwritten by the
+        # "second" ones.  To achieve this, clear out the axes first.
+        for ax in grid:
+            ax.cax.cla()
+            cb = ax.cax.colorbar(ax.images[0])
+
+
+def test_imagegrid():
+    fig = plt.figure()
+    grid = ImageGrid(fig, 111, nrows_ncols=(1, 1))
+    ax = grid[0]
+    im = ax.imshow([[1, 2]], norm=mpl.colors.LogNorm())
+    cb = ax.cax.colorbar(im)
+    assert isinstance(cb.locator, mticker.LogLocator)
+
+
+def test_removal():
+    import matplotlib.pyplot as plt
+    import mpl_toolkits.axisartist as AA
+    fig = plt.figure()
+    ax = host_subplot(111, axes_class=AA.Axes, figure=fig)
+    col = ax.fill_between(range(5), 0, range(5))
+    fig.canvas.draw()
+    col.remove()
+    fig.canvas.draw()
+
+
+@image_comparison(['anchored_locator_base_call.png'], style="mpl20")
+def test_anchored_locator_base_call():
+    fig = plt.figure(figsize=(3, 3))
+    fig1, fig2 = fig.subfigures(nrows=2, ncols=1)
+
+    ax = fig1.subplots()
+    ax.set(aspect=1, xlim=(-15, 15), ylim=(-20, 5))
+    ax.set(xticks=[], yticks=[])
+
+    Z = cbook.get_sample_data("axes_grid/bivariate_normal.npy")
+    extent = (-3, 4, -4, 3)
+
+    axins = zoomed_inset_axes(ax, zoom=2, loc="upper left")
+    axins.set(xticks=[], yticks=[])
+
+    axins.imshow(Z, extent=extent, origin="lower")
+
+
+def test_grid_with_axes_class_not_overriding_axis():
+    Grid(plt.figure(), 111, (2, 2), axes_class=mpl.axes.Axes)
+    RGBAxes(plt.figure(), 111, axes_class=mpl.axes.Axes)