From cf5e438c0297954c4411c1c3ae4ba67a48b134ea Mon Sep 17 00:00:00 2001 From: Semyon Moroz Date: Thu, 27 Mar 2025 17:47:08 +0400 Subject: gh-118761: Always lazy import `re` in `locale` (#129860) --- Lib/locale.py | 11 ++++++++--- .../Library/2025-02-08-21-37-05.gh-issue-118761.EtqxeB.rst | 2 ++ 2 files changed, 10 insertions(+), 3 deletions(-) create mode 100644 Misc/NEWS.d/next/Library/2025-02-08-21-37-05.gh-issue-118761.EtqxeB.rst diff --git a/Lib/locale.py b/Lib/locale.py index 213d5e9..2feb10e 100644 --- a/Lib/locale.py +++ b/Lib/locale.py @@ -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'%(?:\((?P.*?)\))?' - r'(?P[-#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'%(?:\((?P.*?)\))?(?P[-#0-9 +*.hlL]*?)[eEfFgGdiouxXcrs%]') + percents = list(_percent_re.finditer(f)) new_f = _percent_re.sub('%s', f) diff --git a/Misc/NEWS.d/next/Library/2025-02-08-21-37-05.gh-issue-118761.EtqxeB.rst b/Misc/NEWS.d/next/Library/2025-02-08-21-37-05.gh-issue-118761.EtqxeB.rst new file mode 100644 index 0000000..b35275b --- /dev/null +++ b/Misc/NEWS.d/next/Library/2025-02-08-21-37-05.gh-issue-118761.EtqxeB.rst @@ -0,0 +1,2 @@ +Improve import time of :mod:`locale` using lazy import ``re``. Patch by +Semyon Moroz. -- cgit v0.12