Regex Cheatsheet

Regex Expression	Explanation
^	Matches the start of a string or line (depending on multiline mode).
$	Matches the end of a string or line (depending on multiline mode).
\s	Matches any whitespace character (spaces, tabs, newlines).
\S	Matches any non-whitespace character.
[\s\S]	Matches any character, including newlines (often used as a dot-all alternative).
+	Matches one or more of the preceding token (greedy by default).
*	Matches zero or more of the preceding token (greedy by default).
\s*	Matches zero or more whitespace characters.
[\s\S]+	Matches one or more of any character, including newlines.
+?	Matches one or more of the preceding token (in lazy mode, expends until first match).
?+	Matches zero or one of the preceding token (in possessive mode, no backtracking).
[\s\S]?+	Matches zero or one of any character (including newline), but possessive (no backtracking).
re.DOTALL	A Python regex flag that makes . match all characters, including newlines. Without it, . stops at line breaks.
re.MULTILINE	A Python regex flag that makes ^ and $ match at the start and end of each line (not just the whole string).
(...)	Capturing group - if you search by larger string but want to keep only a substring