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bpo-40327: Improve atomicity, speed, and memory efficiency of the items() loop (GH-19628)

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Raymond Hettinger 2020-04-21 16:20:52 -07:00 • committed by GitHub
parent d3a8d616fa
commit 75bedbe2ed
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Lib/pickle.py
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@ -339,7 +339,7 @@ def whichmodule(obj, name):
return module_name
# Protect the iteration by using a list copy of sys.modules against dynamic
# modules that trigger imports of other modules upon calls to getattr.
for module_name, module in list(sys.modules.items()):
for module_name, module in sys.modules.copy().items():
if module_name == '__main__' or module is None:
continue
try: