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Title: gh-101000: Add os.path.splitroot() by barneygale · Pull Request #101002 · python/cpython · GitHub

Open Graph Title: gh-101000: Add os.path.splitroot() by barneygale · Pull Request #101002 · python/cpython

X Title: gh-101000: Add os.path.splitroot() by barneygale · Pull Request #101002 · python/cpython

Description: This PR introduces os.path.splitroot(). See #101000 for motivation. In ntpath, the implementation derives from splitdrive(). The splitdrive() function now calls splitroot(), and returns drive, root + tail. Other functions now call splitroot() rather than splitdrive(). In most cases this replaces their own parsing of path roots. It also avoids adding a stack frame. In posixpath, the normpath() function now calls splitroot() rather than parsing path roots itself. In pathlib, path constructors now call splitroot() rather than using a slow OS-agnostic implementation. Performance: $ ./python -m timeit -s 'from pathlib import PureWindowsPath' 'PureWindowsPath("C:/", "foo", "bar")' 50000 loops, best of 5: 6.04 usec per loop # before 50000 loops, best of 5: 4.03 usec per loop # after $ ./python -m timeit -s 'from pathlib import PurePosixPath' 'PurePosixPath("/", "etc", "hosts")' 100000 loops, best of 5: 3.11 usec per loop # before 100000 loops, best of 5: 2.77 usec per loop # after Future work: Improve performance by using native nt._path_splitroot() Issue: gh-101000

Open Graph Description: This PR introduces os.path.splitroot(). See #101000 for motivation. In ntpath, the implementation derives from splitdrive(). The splitdrive() function now calls splitroot(), and returns drive, root...

X Description: This PR introduces os.path.splitroot(). See #101000 for motivation. In ntpath, the implementation derives from splitdrive(). The splitdrive() function now calls splitroot(), and returns drive, root...

Opengraph URL: https://github.com/python/cpython/pull/101002

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gh-101000: Add os.path.splitroot() https://github.com/python/cpython/pull/101002/commits/2c9eed88823e840d8b39a34b26ae0e63f0a9fe38#top
Show all changes 31 commits https://github.com/python/cpython/pull/101002/files
21c0ba9 gh-101000: Add os.path.splitroot() barneygale Jan 12, 2023 https://github.com/python/cpython/pull/101002/commits/21c0ba9069f496912f6cc6fc31f21055b772d1ea
836b85d Use splitroot() from pathlib barneygale Jan 12, 2023 https://github.com/python/cpython/pull/101002/commits/836b85d887b807bebfdb88f8443a6785e9005dec
bc2d1f9 Use splitroot() from posixpath barneygale Jan 12, 2023 https://github.com/python/cpython/pull/101002/commits/bc2d1f976fa07f092db018edcb398776fbc8a17f
ecdc40d Use splitroot() from ntpath barneygale Jan 12, 2023 https://github.com/python/cpython/pull/101002/commits/ecdc40dc94341feb080bbc5a5e424c930f7faef8
6592b27 Optimizations barneygale Jan 12, 2023 https://github.com/python/cpython/pull/101002/commits/6592b27e1d72516c47713ba508359445fe63e2c2
78f4227 Correct and expand examples in splitroot() docstring barneygale Jan 13, 2023 https://github.com/python/cpython/pull/101002/commits/78f42270b78e44c17d6d387bf9c083e2ba3938ea
9726ca4 Update Lib/ntpath.py barneygale Jan 13, 2023 https://github.com/python/cpython/pull/101002/commits/9726ca4e394947fa322a659593a9f252fe4a9c29
7a6613c Use splitroot() from pathlib.PurePath.with_name() barneygale Jan 14, 2023 https://github.com/python/cpython/pull/101002/commits/7a6613c5dc53391690102e2725cb93791a11007d
26a8dba Reduce ntpath.normpath() diff noise barneygale Jan 15, 2023 https://github.com/python/cpython/pull/101002/commits/26a8dba786c660cb97a112b44d56b42e7414f48d
0c237d4 Simplify ntpath.commonpath() now that 'isabs' is unused. barneygale Jan 15, 2023 https://github.com/python/cpython/pull/101002/commits/0c237d490b2a77759a9813e3b8433f6987b620a8
11ed3eb Reduce posixpath.normpath() diff noise barneygale Jan 15, 2023 https://github.com/python/cpython/pull/101002/commits/11ed3eb55a93fb21bc89ad6a27c7366dab20f0bf
2c9eed8 Improve documentation barneygale Jan 15, 2023 https://github.com/python/cpython/pull/101002/commits/2c9eed88823e840d8b39a34b26ae0e63f0a9fe38
8299e96 Add whatsnew entry. barneygale Jan 15, 2023 https://github.com/python/cpython/pull/101002/commits/8299e969d316a9cd2b391c88cf203f1fa518ddd4
27ffe37 Simplify ntpath.splitroot() slightly barneygale Jan 15, 2023 https://github.com/python/cpython/pull/101002/commits/27ffe37a991ab0a2c8e25b5bfc72630026f2c37c
9beff2a Apply suggestions from code review barneygale Jan 16, 2023 https://github.com/python/cpython/pull/101002/commits/9beff2af6f5c80945fc745cc64ec9912c87b59a2
bacdee1 Update Doc/library/os.path.rst barneygale Jan 16, 2023 https://github.com/python/cpython/pull/101002/commits/bacdee153c5f28413f21c68ca7919d7311340e7b
4ebe545 Note that drive may be empty on Windows barneygale Jan 16, 2023 https://github.com/python/cpython/pull/101002/commits/4ebe54555959283b243ebce697c76ef988a57cfb
2927afe Re-order drive example barneygale Jan 16, 2023 https://github.com/python/cpython/pull/101002/commits/2927afe301417f7a53442416b73b34c45035e371
b0aa73e Update Doc/library/os.path.rst barneygale Jan 16, 2023 https://github.com/python/cpython/pull/101002/commits/b0aa73e41c782a5a4f0008d6cd8f8c2972afc499
19777d6 Adjust docstring examples barneygale Jan 18, 2023 https://github.com/python/cpython/pull/101002/commits/19777d65c409ae85d60c01d27b5a293dc6e5c605
32e212e Apply suggestions from code review barneygale Jan 19, 2023 https://github.com/python/cpython/pull/101002/commits/32e212e1cb08a6d2bf3704075b5d78a72b05b134
37cded3 Update Doc/library/os.path.rst barneygale Jan 19, 2023 https://github.com/python/cpython/pull/101002/commits/37cded31033f0314ee35e90b65794b19d30d8907
5a8dfce Change example username in docs to 'Sam' barneygale Jan 19, 2023 https://github.com/python/cpython/pull/101002/commits/5a8dfce4e15db8cac619637ec2344134547fc540
0e75a55 Adjust first paragraph to use prose barneygale Jan 19, 2023 https://github.com/python/cpython/pull/101002/commits/0e75a55b3f696e4481a51c7e414503aecf85caba
3663237 Update Doc/library/os.path.rst barneygale Jan 22, 2023 https://github.com/python/cpython/pull/101002/commits/36632370006d68e1bf5c67232f7b615e86b0b2aa
053729d Add tests for bytes (POSIX only) and path-like objects (both platforms) barneygale Jan 22, 2023 https://github.com/python/cpython/pull/101002/commits/053729debe973546048b65e360203937ab752e66
694f093 Add tests for mixed path separators (Windows only) barneygale Jan 22, 2023 https://github.com/python/cpython/pull/101002/commits/694f093fb62074ff7e34d54182fa06edd3c606ca
e99e3cd Remove errant newline. barneygale Jan 22, 2023 https://github.com/python/cpython/pull/101002/commits/e99e3cd2262918ee4148258f3f49360ee85850f2
f618a00 Move most test cases from `test_splitdrive` to `test_splitroot` barneygale Jan 22, 2023 https://github.com/python/cpython/pull/101002/commits/f618a00119ba725052c2264cf8ae2ab7a4b9ed56
1c522c9 Mention pathlib performance improvement in news entry. barneygale Jan 22, 2023 https://github.com/python/cpython/pull/101002/commits/1c522c9077ffc4c1e4c188c8c63b6cd3b7c745d5
df17269 Merge branch 'main' into gh-101000-splitroot AlexWaygood Jan 22, 2023 https://github.com/python/cpython/pull/101002/commits/df172692bfca802f83085ecc4ed434deae7c761a
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