René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Add os.path.splitroot() function","articleBody":"# Feature or enhancement\r\n\r\nAdd a function that splits a path into a `(drive, root, tail)` triad:\r\n\r\n1. The _drive_ part has the same meaning as in `splitdrive()`\r\n2. The _root_ part is one of: the empty string, a forward slash, a backward slash (Windows only), or two forward slashes (POSIX only)\r\n3. The _tail_ part is everything following the root.\r\n\r\nSimilarly to `splitdrive()`, a `splitroot()` function would ensure that `drive + root + tail` is the same as the input path.\r\n\r\n# Pitch\r\nThe extra level of detail reflects an extra step in the Windows 'current path' hierarchy -- Windows has both a 'current drive', and a 'current directory' for one or more drives, which results in several kinds of non-absolute paths, e.g. 'foo/bar',  '/foo/bar', 'X:foo/bar'\r\n\r\nThis three-part model is used successfully by pathlib, which exposes _root_ as an attribute, and combines `drive + root` as an attribute called _anchor_. The anchor has useful properties, e.g. comparing two paths anchors can tell us whether a `relative_to()` operation is possible.\r\n\r\nPathlib has [its own implementation of `splitroot()`](https://github.com/python/cpython/blob/08e5594cf3d42391a48e0311f6b9393ec2e00e1e/Lib/pathlib.py#L274-L285), but its performance is hamstrung by its need for OS-agnosticism. By moving the implementation into `ntpath` and `posixpath` we can take advantage of OS-specific rules to improve pathlib performance. \r\n\r\n# Previous discussion\r\n\r\n- https://discuss.python.org/t/add-os-path-splitroot/22243\r\n- https://github.com/python/cpython/pull/31691/files#r944987609\r\n- https://github.com/python/cpython/pull/100351/files/5b67a7489e5518975d0c11033cd35bf60fad0ddf#r1065219273\r\n\n\n\u003c!-- gh-linked-prs --\u003e\n### Linked PRs\n* gh-101002\n\u003c!-- /gh-linked-prs --\u003e\n","author":{"url":"https://github.com/barneygale","@type":"Person","name":"barneygale"},"datePublished":"2023-01-12T19:38:44.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":2},"url":"https://github.com/101000/cpython/issues/101000"}