How to use special characters in Python Regular Expression?
From Python documentation
Non-special characters match themselves. Special characters don't match themselves −
\
| Escape special char or start a sequence.
|
.
| Match any char except newline, see re.DOTALL
|
^
| Match start of the string, see re.MULTILINE
|
$
| Match end of the string, see re.MULTILINE
|
[ ]
| Enclose a set of matchable chars
|
R|S
| Match either regex R or regex S.
|
()
| Create capture group, & indicate precedence
|
After '[', enclose a set, the only special chars are −
]
| End the set, if not the 1st char
|
-
| A range, eg. a-c matches a, b or c
|
^
| Negate the set only if it is the 1st char
|
Quantifiers (append '?' for non-greedy) −
{m}
| Exactly m repetitions
|
{m,n}
| From m (default 0) to n (default infinity)
|
*
| 0 or more. Same as {,}
|
+
| 1 or more. Same as {1,}
|
?
| 0 or 1. Same as {,1}
|
Published on 11-Jan-2018 17:10:36
