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gh-117352: Handle /:/ for ntpath.isabs #117362

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gh-117352: Handle /:/ for ntpath.isabs #117362

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cdbb595
Handle `/:` for `ntpath.isabs`
nineteendo Mar 29, 2024
fec0a93
Speedup `ntpath.isabs`
nineteendo Mar 29, 2024
cf62868
📜🤖 Added by blurb_it.
blurb-it[bot] Mar 29, 2024
2950921
Simplify check
nineteendo Mar 30, 2024
941c276
Update 2024-03-29-07-34-39.gh-issue-117352.-34fR4.rst
nineteendo Mar 31, 2024
9abff6a
Revert `str.startswith()`
nineteendo Apr 1, 2024
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2 changes: 1 addition & 1 deletion Lib/ntpath.py
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Original file line number Diff line number Diff line change
Expand Up @@ -93,7 +93,7 @@ def isabs(s):
double_sep = '\\\\'
s = s[:3].replace(altsep, sep)
# Absolute: UNC, device, and paths with a drive and root.
return s.startswith(colon_sep, 1) or s.startswith(double_sep)
return (s[1:3] == colon_sep and s[:1] != sep) or s[:2] == double_sep


# Join two (or more) paths.
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3 changes: 2 additions & 1 deletion Lib/test/test_ntpath.py
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Expand Up @@ -234,11 +234,12 @@ def test_isabs(self):
tester('ntpath.isabs("c:/foo/bar")', 1)
tester('ntpath.isabs("\\\\conky\\mountpoint\\")', 1)

# gh-44626: paths with only a drive or root are not absolute.
# gh-44626 & gh-117352: paths with only a drive or root are not absolute.
tester('ntpath.isabs("\\foo\\bar")', 0)
tester('ntpath.isabs("/foo/bar")', 0)
tester('ntpath.isabs("c:foo\\bar")', 0)
tester('ntpath.isabs("c:foo/bar")', 0)
tester('ntpath.isabs("/:/foo/bar")', 0)

# gh-96290: normal UNC paths and device paths without trailing backslashes
tester('ntpath.isabs("\\\\conky\\mountpoint")', 1)
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1 change: 1 addition & 0 deletions Misc/NEWS.d/next/Core and Builtins/2024-03-29-07-34-39.gh-issue-117352.-34fR4.rst
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@@ -0,0 +1 @@
Handle ``/:`` for :func:`ntpath.isabs`.