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gh-107089: Improve Shelf.clear method performance (gh-107090)

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James Cave 2023-07-28 20:08:11 -04:00 committed by GitHub
parent 11c055f5ff
commit 810d5d87d9
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7
Lib/shelve.py
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@ -226,6 +226,13 @@ def __init__(self, filename, flag='c', protocol=None, writeback=False):
import dbm import dbm
Shelf.__init__(self, dbm.open(filename, flag), protocol, writeback) Shelf.__init__(self, dbm.open(filename, flag), protocol, writeback)
def clear(self):
"""Remove all items from the shelf."""
# Call through to the clear method on dbm-backed shelves.
# see https://github.com/python/cpython/issues/107089
self.cache.clear()
self.dict.clear()
def open(filename, flag='c', protocol=None, writeback=False): def open(filename, flag='c', protocol=None, writeback=False):
"""Open a persistent dictionary for reading and writing. """Open a persistent dictionary for reading and writing.

1
Misc/ACKS
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@ -289,6 +289,7 @@ Edward Catmur
Lorenzo M. Catucci Lorenzo M. Catucci
Bruno Cauet Bruno Cauet
Donn Cave Donn Cave
James Cave
Charles Cazabon Charles Cazabon
Jesús Cea Avión Jesús Cea Avión
Per Cederqvist Per Cederqvist

2
Misc/NEWS.d/next/Library/2023-07-22-21-57-34.gh-issue-107089.Dnget2.rst Normal file
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@ -0,0 +1,2 @@
Shelves opened with :func:`shelve.open` have a much faster :meth:`clear`
method. Patch by James Cave.