Regex Gramatikal (Kamus)

Kesulitan memahami regex kita prlu namanya kamus untuk membantu menerjemahkan fungsi regex. Berikut ini beberapa karakter yang digunakan dalam penulisan regex.

Regex	Description
\d	Matches any decimal digit; this is equivalent to the class [0-9]
\D	Matches any non-digit character; this is equivalent to the class [^0-9].
\s	Matches any whitespace character; this is equivalent to the class [ \t\n\r\f\v].
\S	Matches any non-whitespace character; this is equivalent to the class [^ \t\n\r\f\v].
\w	Matches any alphanumeric character; this is equivalent to the class [a-zA-Z0-9_].
\W	Matches any non-alphanumeric character; this is equivalent to the class [^a-zA-Z0-9_].
\Z	Matches only at end of string
[..]	Match single character in brackets
[^..]	Match any single character not in brackets
.	Match any character except newline
$	Match the end of the string
*	Match 0 or more repetitions
+	1 or more repetitions
{m}	Exactly m copies of the previous RE should be matched.
|	Match A or B. A|B
?	0 or 1 repetitions of the preceding RE
[a-z]	Any lowercase character
[A-Z]	Any uppercase character
[a-zA-Z]	Any character
[0-9]	Any digit

sumber :
https://pythonspot.com/regular-expressions/
http://regexlib.com/DisplayPatterns.aspx?cattabindex=4&categoryId=5&AspxAutoDetectCookieSupport=1