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gh-140971: Document pathlib.PurePath("") meaning and bool value #157293

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gh-140971: Document pathlib.PurePath("") meaning and bool value #157293

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10 changes: 7 additions & 3 deletions Doc/library/pathlib.rst
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Expand Up @@ -131,10 +131,14 @@ we also call *flavours*:
>>> PurePath(Path('foo'), Path('bar'))
PurePosixPath('foo/bar')

When *pathsegments* is empty, the current directory is assumed::
When *pathsegments* is empty or a single empty string,
the current directory is assumed::

>>> PurePath()
PurePosixPath('.')
>>> PurePath(), PurePath('')
(PurePosixPath('.'), PurePosixPath('.'))

The boolean value of either expression is True.
This differs from ``os.path.exists("")``, which returns ``False``.

If a segment is an absolute path, all previous segments are ignored
(like :func:`os.path.join`)::
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