diff options
Diffstat (limited to 'Lib/sre.py')
| -rw-r--r-- | Lib/sre.py | 22 |
1 files changed, 21 insertions, 1 deletions
diff --git a/Lib/sre.py b/Lib/sre.py index 48d390a5ec..6706fac869 100644 --- a/Lib/sre.py +++ b/Lib/sre.py @@ -23,6 +23,8 @@ __all__ = [ "match", "search", "sub", "subn", "split", "findall", "U", "IGNORECASE", "LOCALE", "MULTILINE", "DOTALL", "VERBOSE", "UNICODE", "error" ] +__version__ = "2.1b2" + # this module works under 1.5.2 and later. don't use string methods import string @@ -90,6 +92,7 @@ def compile(pattern, flags=0): def purge(): "Clear the regular expression cache" _cache.clear() + _cache_repl.clear() def template(pattern, flags=0): "Compile a template pattern, returning a pattern object" @@ -111,6 +114,8 @@ def escape(pattern): # internals _cache = {} +_cache_repl = {} + _MAXCACHE = 100 def _join(seq, sep): @@ -134,6 +139,21 @@ def _compile(*key): _cache[key] = p return p +def _compile_repl(*key): + # internal: compile replacement pattern + p = _cache_repl.get(key) + if p is not None: + return p + repl, pattern = key + try: + p = sre_parse.parse_template(repl, pattern) + except error, v: + raise error, v # invalid expression + if len(_cache_repl) >= _MAXCACHE: + _cache_repl.clear() + _cache_repl[key] = p + return p + def _expand(pattern, match, template): # internal: match.expand implementation hook template = sre_parse.parse_template(template, pattern) @@ -148,7 +168,7 @@ def _subn(pattern, template, string, count=0): if callable(template): filter = template else: - template = sre_parse.parse_template(template, pattern) + template = _compile_repl(template, pattern) def filter(match, template=template): return sre_parse.expand_template(template, match) n = i = 0 |