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rl/Lib/site-packages/gymnasium/spaces/__init__.py

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+"""This module implements various spaces.
+
+Spaces describe mathematical sets and are used in Gym to specify valid actions and observations.
+Every Gym environment must have the attributes ``action_space`` and ``observation_space``.
+If, for instance, three possible actions (0,1,2) can be performed in your environment and observations
+are vectors in the two-dimensional unit cube, the environment code may contain the following two lines::
+
+    self.action_space = spaces.Discrete(3)
+    self.observation_space = spaces.Box(0, 1, shape=(2,))
+
+All spaces inherit from the :class:`Space` superclass.
+"""
+from gymnasium.spaces.box import Box
+from gymnasium.spaces.dict import Dict
+from gymnasium.spaces.discrete import Discrete
+from gymnasium.spaces.graph import Graph, GraphInstance
+from gymnasium.spaces.multi_binary import MultiBinary
+from gymnasium.spaces.multi_discrete import MultiDiscrete
+from gymnasium.spaces.sequence import Sequence
+from gymnasium.spaces.space import Space
+from gymnasium.spaces.text import Text
+from gymnasium.spaces.tuple import Tuple
+from gymnasium.spaces.utils import flatdim, flatten, flatten_space, unflatten
+
+
+__all__ = [
+    # base space
+    "Space",
+    # fundamental spaces
+    "Box",
+    "Discrete",
+    "Text",
+    "MultiDiscrete",
+    "MultiBinary",
+    # composite spaces
+    "Graph",
+    "GraphInstance",
+    "Tuple",
+    "Sequence",
+    "Dict",
+    # util functions (there are more utility functions in vector/utils/spaces.py)
+    "flatdim",
+    "flatten_space",
+    "flatten",
+    "unflatten",
+]