python-3.6.zip added from Github

README.cosmo contains the necessary links.

third_party/python/Lib/test/test_import/__main__.py

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+import unittest
+
+unittest.main('test.test_import')

third_party/python/Lib/test/test_import/data/circular_imports/basic.py

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+"""Circular imports through direct, relative imports."""
+from . import basic2

third_party/python/Lib/test/test_import/data/circular_imports/basic2.py

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+from . import basic

third_party/python/Lib/test/test_import/data/circular_imports/indirect.py

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+from . import basic, basic2

third_party/python/Lib/test/test_import/data/circular_imports/rebinding.py

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+"""Test the binding of names when a circular import shares the same name as an
+attribute."""
+from .rebinding2 import util

third_party/python/Lib/test/test_import/data/circular_imports/rebinding2.py

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+from .subpkg import util
+from . import rebinding
+util = util.util

third_party/python/Lib/test/test_import/data/circular_imports/subpackage.py

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+"""Circular import involving a sub-package."""
+from .subpkg import subpackage2

third_party/python/Lib/test/test_import/data/circular_imports/subpkg/subpackage2.py

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+#from .util import util
+from .. import subpackage

third_party/python/Lib/test/test_import/data/circular_imports/subpkg/util.py

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+def util():
+    pass

third_party/python/Lib/test/test_import/data/circular_imports/util.py

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+def util():
+    pass

third_party/python/Lib/test/test_import/data/package/__init__.py

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+import package.submodule
+package.submodule

third_party/python/Lib/test/test_import/data/package2/submodule1.py

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+import sys
+sys.modules.pop(__package__, None)
+from . import submodule2