#2650: re.escape() no longer escapes the "_".
diff --git a/Lib/re.py b/Lib/re.py
index abd7ea2..cdf5976 100644
--- a/Lib/re.py
+++ b/Lib/re.py
@@ -215,12 +215,14 @@
return _compile(pattern, flags|T)
_alphanum_str = frozenset(
- "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ01234567890")
+ "_abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ01234567890")
_alphanum_bytes = frozenset(
- b"abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ01234567890")
+ b"_abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ01234567890")
def escape(pattern):
- "Escape all non-alphanumeric characters in pattern."
+ """
+ Escape all the characters in pattern except ASCII letters, numbers and '_'.
+ """
if isinstance(pattern, str):
alphanum = _alphanum_str
s = list(pattern)