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GH-113528: Deoptimise pathlib._abc.PurePathBase.parts (#113883)

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Implement `parts` using `_stack`, which itself calls `pathmod.split()`
repeatedly. This avoids use of `_tail`, which will be moved to `PurePath`
shortly.
This commit is contained in:
Barney Gale 2024-01-09 22:46:50 +00:00 • committed by GitHub
parent 623b338adf
commit 5c7bd0e398
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2 changed files with 13 additions and 4 deletions
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9
Lib/pathlib/__init__.py
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@ -195,6 +195,15 @@ class PurePath(_abc.PurePathBase):
return NotImplemented return NotImplemented
return self._parts_normcase >= other._parts_normcase return self._parts_normcase >= other._parts_normcase
@property
def parts(self):
"""An object providing sequence-like access to the
components in the filesystem path."""
if self.drive or self.root:
return (self.drive + self.root,) + tuple(self._tail)
else:
return tuple(self._tail)
@property @property
def parent(self): def parent(self):
"""The logical parent of the path.""" """The logical parent of the path."""

8
Lib/pathlib/_abc.py
View file

@ -381,10 +381,10 @@ class PurePathBase:
def parts(self): def parts(self):
"""An object providing sequence-like access to the """An object providing sequence-like access to the
components in the filesystem path.""" components in the filesystem path."""
if self.drive or self.root: anchor, parts = self._stack
return (self.drive + self.root,) + tuple(self._tail) if anchor:
else: parts.append(anchor)
return tuple(self._tail) return tuple(reversed(parts))
def joinpath(self, *pathsegments): def joinpath(self, *pathsegments):
"""Combine this path with one or several arguments, and return a """Combine this path with one or several arguments, and return a