Speed-up escape()
diff --git a/Lib/sre.py b/Lib/sre.py
index 7969723..a33e34e 100644
--- a/Lib/sre.py
+++ b/Lib/sre.py
@@ -188,12 +188,18 @@
"Compile a template pattern, returning a pattern object"
return _compile(pattern, flags|T)
+_alphanum = {}
+for c in 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ01234567890':
+ _alphanum[c] = 1
+del c
+
def escape(pattern):
"Escape all non-alphanumeric characters in pattern."
s = list(pattern)
+ alphanum = _alphanum
for i in range(len(pattern)):
c = pattern[i]
- if not ("a" <= c <= "z" or "A" <= c <= "Z" or "0" <= c <= "9"):
+ if c not in alphanum:
if c == "\000":
s[i] = "\\000"
else: