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Issue #21052: Don't raise ImportWarning for sys.meta_path or

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sys.path_hooks when set to None during interpreter shutdown.

Thanks to Martin Panter for the initial bug report.
This commit is contained in:
Brett Cannon 2014-10-10 10:54:28 -04:00
parent 1aa3cb6030
commit 5e8b04eefb
3 changed files with 31 additions and 26 deletions
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4
Lib/importlib/_bootstrap.py
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@ -1806,7 +1806,7 @@ class PathFinder:
If 'hooks' is false then use sys.path_hooks.
"""
if not sys.path_hooks:
if sys.path_hooks is not None and not sys.path_hooks:
_warnings.warn('sys.path_hooks is empty', ImportWarning)
for hook in sys.path_hooks:
try:
@ -2095,7 +2095,7 @@ def _find_spec_legacy(finder, name, path):
def _find_spec(name, path, target=None):
"""Find a module's loader."""
if not sys.meta_path:
if sys.meta_path is not None and not sys.meta_path:
_warnings.warn('sys.meta_path is empty', ImportWarning)
# We check sys.modules here for the reload case. While a passed-in
# target will usually indicate a reload there is no guarantee, whereas