Reference: Regular expressions

Quick-lookup pages. Short, dense, and designed to skim — the sort of thing you keep open in a tab while you're stitching a pattern together. If you're here to learn regex for the first time, start with Learn instead.

Pages in this section

• re module quick reference — the functions and methods you actually use, with their signatures and return types.
• Regex syntax reference — every metacharacter, character class, anchor, and quantifier in one place.
• Regex flags reference — re.IGNORECASE, re.MULTILINE, re.DOTALL, and the rest, with what they actually change.