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Issue #22410: Module level functions in the re module now cache compiled

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locale-dependent regular expressions taking into account the locale.
This commit is contained in:
Serhiy Storchaka 2014-10-31 00:56:45 +02:00
commit 7cc0a1f7cb
3 changed files with 49 additions and 2 deletions
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11
Lib/re.py
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@ -122,6 +122,7 @@ This module also defines an exception 'error'.
import sys
import sre_compile
import sre_parse
import _locale
# public symbols
__all__ = [
@ -274,7 +275,9 @@ _MAXCACHE = 512
def _compile(pattern, flags):
# internal: compile pattern
try:
return _cache[type(pattern), pattern, flags]
p, loc = _cache[type(pattern), pattern, flags]
if loc is None or loc == _locale.setlocale(_locale.LC_CTYPE):
return p
except KeyError:
pass
if isinstance(pattern, _pattern_type):
@ -288,7 +291,11 @@ def _compile(pattern, flags):
if not (flags & DEBUG):
if len(_cache) >= _MAXCACHE:
_cache.clear()
_cache[type(pattern), pattern, flags] = p
if p.flags & LOCALE:
loc = _locale.setlocale(_locale.LC_CTYPE)
else:
loc = None
_cache[type(pattern), pattern, flags] = p, loc
return p
def _compile_repl(repl, pattern):