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bpo-34329: Doc'd how to remove suffix of pathlib.Path() (GH-8655) 

(cherry picked from commit 46dc4e34ed)

Co-authored-by: Stefan Otte <stefan.otte@gmail.com>
This commit is contained in:
Miss Islington (bot) 2018-08-03 14:45:46 -07:00 committed by Berker Peksag
parent 28dbfb2fd3
commit 39fcd99498
2 changed files with 9 additions and 3 deletions
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6
Doc/library/pathlib.rst
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@ -559,7 +559,8 @@ Pure paths provide the following methods and properties:
.. method:: PurePath.with_suffix(suffix) .. method:: PurePath.with_suffix(suffix)
Return a new path with the :attr:`suffix` changed. If the original path Return a new path with the :attr:`suffix` changed. If the original path
doesn't have a suffix, the new *suffix* is appended instead:: doesn't have a suffix, the new *suffix* is appended instead. If the
*suffix* is an empty string, the original suffix is removed::
>>> p = PureWindowsPath('c:/Downloads/pathlib.tar.gz') >>> p = PureWindowsPath('c:/Downloads/pathlib.tar.gz')
>>> p.with_suffix('.bz2') >>> p.with_suffix('.bz2')
@ -567,6 +568,9 @@ Pure paths provide the following methods and properties:
>>> p = PureWindowsPath('README') >>> p = PureWindowsPath('README')
>>> p.with_suffix('.txt') >>> p.with_suffix('.txt')
PureWindowsPath('README.txt') PureWindowsPath('README.txt')
>>> p = PureWindowsPath('README.txt')
>>> p.with_suffix('')
PureWindowsPath('README')
.. _concrete-paths: .. _concrete-paths:

6
Lib/pathlib.py
View File

@ -807,8 +807,10 @@ class PurePath(object):
self._parts[:-1] + [name]) self._parts[:-1] + [name])
def with_suffix(self, suffix): def with_suffix(self, suffix):
"""Return a new path with the file suffix changed (or added, if none).""" """Return a new path with the file suffix changed. If the path
# XXX if suffix is None, should the current suffix be removed? has no suffix, add given suffix. If the given suffix is an empty
string, remove the suffix from the path.
"""
f = self._flavour f = self._flavour
if f.sep in suffix or f.altsep and f.altsep in suffix: if f.sep in suffix or f.altsep and f.altsep in suffix:
raise ValueError("Invalid suffix %r" % (suffix)) raise ValueError("Invalid suffix %r" % (suffix))