GH-82805: Fix handling of single-dot file extensions in pathlib #118952
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pathlib now treats "`.`" as a valid file extension (suffix). This brings it in line with `os.path.splitext()`. In the (private) pathlib ABCs, we add a new `ParserBase.splitext()` method that splits a path into a `(root, ext)` pair, like `os.path.splitext()`. This method is called by `PurePathBase.stem`, `suffix`, etc. In a future version of pathlib, we might make these base classes public, and so users will be able to define their own `splitext()` method to control file extension splitting. In `pathlib.PurePath` we add optimised `stem`, `suffix` and `suffixes` properties that don't use `splitext()`, which avoids computing the path base name twice.
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…python#118952) pathlib now treats "`.`" as a valid file extension (suffix). This brings it in line with `os.path.splitext()`. In the (private) pathlib ABCs, we add a new `ParserBase.splitext()` method that splits a path into a `(root, ext)` pair, like `os.path.splitext()`. This method is called by `PurePathBase.stem`, `suffix`, etc. In a future version of pathlib, we might make these base classes public, and so users will be able to define their own `splitext()` method to control file extension splitting. In `pathlib.PurePath` we add optimised `stem`, `suffix` and `suffixes` properties that don't use `splitext()`, which avoids computing the path base name twice.
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pathlib now treats "
." as a valid file extension (suffix). This brings it in line withos.path.splitext().In the (private) pathlib ABCs, we add a new
ParserBase.splitext()method that splits a path into a(root, ext)pair, likeos.path.splitext(). This method is called byPurePathBase.stem,suffix, etc. In a future version of pathlib, we might make these base classes public, and so users will be able to define their ownsplitext()method to control file extension splitting.In
pathlib.PurePathwe add optimisedstem,suffixandsuffixesproperties that don't usesplitext(), which avoids computing the path base name twice.📚 Documentation preview 📚: https://cpython-previews--118952.org.readthedocs.build/