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[3.12] gh-117983: Defer import of threading for lazy module loading (GH-120233) #121350

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Jul 3, 2024
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[3.12] gh-117983: Defer import of threading for lazy module loading (GH-120233) #121350

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4 changes: 3 additions & 1 deletion Lib/importlib/util.py
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Original file line number Diff line number Diff line change
Expand Up @@ -13,7 +13,6 @@

import _imp
import sys
import threading
import types


Expand Down Expand Up @@ -253,6 +252,9 @@ def create_module(self, spec):

def exec_module(self, module):
"""Make the module load lazily."""
# Threading is only needed for lazy loading, and importlib.util can
# be pulled in at interpreter startup, so defer until needed.
import threading
module.__spec__.loader = self.loader
module.__loader__ = self.loader
# Don't need to worry about deep-copying as trying to set an attribute
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2 changes: 2 additions & 0 deletions Misc/NEWS.d/next/Library/2024-06-07-10-10-32.gh-issue-117983.NeMR9n.rst
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@@ -0,0 +1,2 @@
Defer the ``threading`` import in ``importlib.util`` until lazy loading is
used.
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