Issue #16203: Add re.fullmatch() function and regex.fullmatch() method,
which anchor the pattern at both ends of the string to match.
Original patch by Matthew Barnett.
diff --git a/Lib/re.py b/Lib/re.py
index b41aab0..77f5e3f 100644
--- a/Lib/re.py
+++ b/Lib/re.py
@@ -85,16 +85,17 @@
\\ Matches a literal backslash.
This module exports the following functions:
- match Match a regular expression pattern to the beginning of a string.
- search Search a string for the presence of a pattern.
- sub Substitute occurrences of a pattern found in a string.
- subn Same as sub, but also return the number of substitutions made.
- split Split a string by the occurrences of a pattern.
- findall Find all occurrences of a pattern in a string.
- finditer Return an iterator yielding a match object for each match.
- compile Compile a pattern into a RegexObject.
- purge Clear the regular expression cache.
- escape Backslash all non-alphanumerics in a string.
+ match Match a regular expression pattern to the beginning of a string.
+ fullmatch Match a regular expression pattern to all of a string.
+ search Search a string for the presence of a pattern.
+ sub Substitute occurrences of a pattern found in a string.
+ subn Same as sub, but also return the number of substitutions made.
+ split Split a string by the occurrences of a pattern.
+ findall Find all occurrences of a pattern in a string.
+ finditer Return an iterator yielding a match object for each match.
+ compile Compile a pattern into a RegexObject.
+ purge Clear the regular expression cache.
+ escape Backslash all non-alphanumerics in a string.
Some of the functions in this module takes flags as optional parameters:
A ASCII For string patterns, make \w, \W, \b, \B, \d, \D
@@ -123,7 +124,7 @@
import sre_parse
# public symbols
-__all__ = [ "match", "search", "sub", "subn", "split", "findall",
+__all__ = [ "match", "fullmatch", "search", "sub", "subn", "split", "findall",
"compile", "purge", "template", "escape", "A", "I", "L", "M", "S", "X",
"U", "ASCII", "IGNORECASE", "LOCALE", "MULTILINE", "DOTALL", "VERBOSE",
"UNICODE", "error" ]
@@ -154,6 +155,11 @@
a match object, or None if no match was found."""
return _compile(pattern, flags).match(string)
+def fullmatch(pattern, string, flags=0):
+ """Try to apply the pattern to all of the string, returning
+ a match object, or None if no match was found."""
+ return _compile(pattern, flags).fullmatch(string)
+
def search(pattern, string, flags=0):
"""Scan through string looking for a match to the pattern, returning
a match object, or None if no match was found."""