In Python, the re module is used for working with regular expressions (regex). Regular expressions are patterns that allow you to search, match, and manipulate strings. This tutorial explains how to use re.findall() to extract specific patterns from a string using regex.
We will break down how to write a regex pattern that matches numbers, including integers and floating-point numbers, with optional signs (+ or -). Then, we’ll provide multiple examples to show how it works in different scenarios.