Regular expressions

This guide covers pattern matching with Python's re module: syntax, quantifiers, character classes, groups, flags, and practical patterns for extracting data from text.

Coming soon

This guide is awaiting migration into Agilearn. The archived version remains available at accuser.dev/regex-with-python.

What will be here

Learn — your first pattern, character classes and quantifiers, groups and capturing, find-and-replace.

Recipes — extracting data from text, validating email addresses, using regex with file I/O, avoiding common mistakes.

Reference — re module, regex syntax, flags.

Concepts — why regular expressions; understanding the regex engine.