I am done

rl/Lib/site-packages/setuptools/tests/test_extern.py

@@ -0,0 +1,15 @@
+import importlib
+import pickle
+
+import packaging
+
+from setuptools import Distribution
+
+
+def test_reimport_extern():
+    packaging2 = importlib.import_module(packaging.__name__)
+    assert packaging is packaging2
+
+
+def test_distribution_picklable():
+    pickle.loads(pickle.dumps(Distribution()))