Py Regex — Free Python Tutorial
Learn Py Regex in Python with a free, beginner-friendly tutorial, examples and practice for Indian students on Syllab.in.
TL;DR: Learn Py Regex in Python with a free, beginner-friendly tutorial, examples and practice for Indian students on Syllab.in.
Written & reviewed by the Syllab.in Academic Team (CBSE/NCERT subject experts) · Updated
Py Regex in Python
Regular expressions (regex) are patterns for matching, searching, and extracting text. Python's re module provides full regex support.
Common patterns: \d matches any digit, \w matches any word character (letter/digit/_), \s matches whitespace. . matches any character. * means 0 or more, + means 1 or more, ? means 0 or 1.
Key functions: re.search() finds pattern anywhere, re.match() checks at start, re.findall() finds all matches, re.sub() replaces matches.
Regex is used for validating emails/phone numbers, extracting data from text, scraping web pages, and cleaning messy data.
Py Regex — Syntax
import re
# Search for a pattern
match = re.search(r'pattern', text)
if match:
print(match.group())
# Find all matches
matches = re.findall(r'\\d+', text)
# Replace pattern
cleaned = re.sub(r'pattern', 'replacement', text)
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