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Python RegEx

This lesson is part of Python · All levels

Summary

Regular expression or regex is a pattern of text for searching, matching, and replacing a string based on a specific rule. The re built-in module provides functions such as search(), findall(), and sub() to implement the pattern. Specific characters like \d for digits or \s for spaces allow for highly flexible matching.

Key points

The re module is used to work with regular expression.
Re.search() searches for the first appearance, while re.findall() collects all matches.
Re.sub() replaces the text that matches the pattern.
Write the pattern as a raw string r"..." to avoid misinterpretation of the backslash.

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