commit 41660cac63c1a216e43335007e329e213054100e
author Miss Islington (bot) <31488909+miss-islington@users.noreply.github.com> Mon Apr 20 13:24:35 2020 -0700
committer GitHub <noreply@github.com> Mon Apr 20 13:24:35 2020 -0700
tree a064da64f7a23e52220923aad6675c5567028979
parent 887ff8e37e238fbce18c647e588283904f38ab24

bpo-39942:Fix failure in `TypeVar` when missing `__name__` (GH-19616)


https://bugs.python.org/issue39942
(cherry picked from commit a25a04fea5446b1712cde0cff556574be139285a)

Co-authored-by: HongWeipeng <hongweichen8888@sina.com>

Lib/typing.py

diff --git a/Lib/typing.py b/Lib/typing.py
index 7aab8db..f4fb08f 100644
--- a/Lib/typing.py
+++ b/Lib/typing.py
@@ -600,7 +600,10 @@
             self.__bound__ = _type_check(bound, "Bound must be a type.")
         else:
             self.__bound__ = None
-        def_mod = sys._getframe(1).f_globals['__name__']  # for pickling
+        try:
+            def_mod = sys._getframe(1).f_globals.get('__name__', '__main__')  # for pickling
+        except (AttributeError, ValueError):
+            def_mod = None
         if def_mod != 'typing':
             self.__module__ = def_mod