gh-86682: Adds sys._getframemodulename as an alternative to using _getframe (GH-99520)

Also updates calls in collections, doctest, enum, and typing modules to use _getframemodulename first when available.

1 files changed, 7 insertions, 5 deletions

diff --git a/Lib/enum.py b/Lib/enum.py
index 21f6388..4658393 100644
--- a/Lib/enum.py
+++ b/Lib/enum.py
@@ -862,13 +862,15 @@ class EnumType(type):
                 member_name, member_value = item
             classdict[member_name] = member_value
 
-        # TODO: replace the frame hack if a blessed way to know the calling
-        # module is ever developed
         if module is None:
             try:
-                module = sys._getframe(2).f_globals['__name__']
-            except (AttributeError, ValueError, KeyError):
-                pass
+                module = sys._getframemodulename(2)
+            except AttributeError:
+                # Fall back on _getframe if _getframemodulename is missing
+                try:
+                    module = sys._getframe(2).f_globals['__name__']
+                except (AttributeError, ValueError, KeyError):
+                    pass
         if module is None:
             _make_class_unpicklable(classdict)
         else: