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gh-118761: Always lazy import re in locale (#129860)

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Semyon Moroz 2025-03-27 17:47:08 +04:00 • committed by GitHub
parent 3796884528
commit cf5e438c02
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2 changed files with 10 additions and 3 deletions
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11
Lib/locale.py
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@ -13,7 +13,6 @@ also includes default encodings for all supported locale names.
import sys
import encodings
import encodings.aliases
import re
import _collections_abc
from builtins import str as _builtin_str
import functools
@ -177,8 +176,7 @@ def _strip_padding(s, amount):
amount -= 1
return s[lpos:rpos+1]
_percent_re = re.compile(r'%(?:\((?P<key>.*?)\))?'
r'(?P<modifiers>[-#0-9 +*.hlL]*?)[eEfFgGdiouxXcrs%]')
_percent_re = None
def _format(percent, value, grouping=False, monetary=False, *additional):
if additional:
@ -217,6 +215,13 @@ def format_string(f, val, grouping=False, monetary=False):
Grouping is applied if the third parameter is true.
Conversion uses monetary thousands separator and grouping strings if
forth parameter monetary is true."""
global _percent_re
if _percent_re is None:
import re
_percent_re = re.compile(r'%(?:\((?P<key>.*?)\))?(?P<modifiers'
r'>[-#0-9 +*.hlL]*?)[eEfFgGdiouxXcrs%]')
percents = list(_percent_re.finditer(f))
new_f = _percent_re.sub('%s', f)

2
Misc/NEWS.d/next/Library/2025-02-08-21-37-05.gh-issue-118761.EtqxeB.rst Normal file
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@ -0,0 +1,2 @@
Improve import time of :mod:`locale` using lazy import ``re``. Patch by
Semyon Moroz.