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Remove deprecated `is_reserved` from `pathlib` · Issue #133875 · python/cpython · GitHub
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Remove deprecated is_reserved from pathlib #133875

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Remove deprecated is_reserved from pathlib#133875
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sobolevn
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stdlibStandard Library Python modules in the Lib/ directorytopic-pathlibtype-featureA feature request or enhancement
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@sobolevn
sobolevn
opened on May 11, 2025

Feature or enhancement

It was deprecated in 3.13:

* :mod:`pathlib`:

  * Deprecate :meth:`.PurePath.is_reserved`,
    to be removed in Python 3.15.
    Use :func:`os.path.isreserved` to detect reserved paths on Windows.
    (Contributed by Barney Gale in :gh:`88569`.)

cpython/Lib/pathlib/__init__.py

Lines 521 to 531 in 9b9cdb6

def is_reserved(self):
"""Return True if the path contains one of the special names reserved
by the system, if any."""
import warnings
msg = ("pathlib.PurePath.is_reserved() is deprecated and scheduled "
"for removal in Python 3.15. Use os.path.isreserved() to "
"detect reserved paths on Windows.")
warnings._deprecated("pathlib.PurePath.is_reserved", msg, remove=(3, 15))
if self.parser is ntpath:
return self.parser.isreserved(self)
return False

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