From 75bedbe2ed4119ff18a2ea86c544b3cf08a92e75 Mon Sep 17 00:00:00 2001 From: Raymond Hettinger Date: Tue, 21 Apr 2020 16:20:52 -0700 Subject: bpo-40327: Improve atomicity, speed, and memory efficiency of the items() loop (GH-19628) --- Lib/pickle.py | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/Lib/pickle.py b/Lib/pickle.py index d7adc16..1fc8b0d 100644 --- a/Lib/pickle.py +++ b/Lib/pickle.py @@ -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: -- cgit v0.12