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bpo-41354: Adjust filecmp.cmp() to match documentation by chanke-mpcdf · Pull Request #21580 · python/cpython · GitHub

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bpo-41354: Adjust filecmp.cmp() to match documentation #21580

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bpo-41354: Adjust filecmp.cmp() to match documentation #21580

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6 changes: 3 additions & 3 deletions Lib/filecmp.py
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Original file line number Diff line number Diff line change
Expand Up @@ -53,10 +53,10 @@ def cmp(f1, f2, shallow=True):
s2 = _sig(os.stat(f2))
if s1[0] != stat.S_IFREG or s2[0] != stat.S_IFREG:
return False
if shallow and s1 == s2:
return True
if s1[1] != s2[1]:
if s1 != s2:

akulakov Jul 12, 2021

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Choose a reason Spam Abuse Off Topic Outdated Duplicate Resolved Low Quality

It seems like if mtime is different but otherwise files are the same, current code will return True but this PR will change it to return False. That both breaks backwards compatibility and doesn't seem right to me.
return False
if shallow:
return True

outcome = _cache.get((f1, f2, s1, s2))
if outcome is None:
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