python regex find pattern in string

Regular expressions, often referred to as regex or regexp, provide a powerful and flexible way to search, match, and manipulate strings in Python. The re module in Python provides support for regular expressions, allowing you to define patterns and search for matches within strings. In this tutorial, we'll explore the basics of using regex to find patterns in strings.
To use regular expressions in Python, you need to import the re module.
Let's start with some basic patterns and how to use them.
To find a specific substring in a string, you can use a literal match.
In this example, r'hello' is a raw string representing the literal characters 'hello'. The search function looks for the pattern in the given text, and if a match is found, it returns a match object.
Character classes allow you to match any one of a set of characters.
Here, [aeiou] matches any one of the vowels in the text. The findall function returns a list of all matches.
The dot . is a wildcard character that matches any single character.
In this example, he..o matches any five-letter string starting with 'he' and ending with 'o', where the two dots represent any two characters.
Quantifiers specify the number of occurrences of a character or a group.
Here, \d{3}-\d{2}-\d{4} matches a pattern like '123-45-6789', where \d represents a digit, and {n} specifies the exact number of occurrences.
Regular expressions in Python provide a powerful tool for string manipulation and pattern matching. This tutorial covers only the