a frozenset is better here

2012-02-20 23:13:20 -05:00 · 2012-02-20 23:13:20 -05:00 · c59df7d4e9
parent 740593416a
commit c59df7d4e9
1 changed files with 2 additions and 1 deletions
--- a/Lib/re.py
+++ b/Lib/re.py
@ -198,7 +198,8 @@ def template(pattern, flags=0):
    "Compile a template pattern, returning a pattern object"
    return _compile(pattern, flags|T)

-_alphanum = set('abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ01234567890')
+_alphanum = frozenset(
+    "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ01234567890")

 def escape(pattern):
    "Escape all non-alphanumeric characters in pattern."