Regular Expression Examples

Regular Expression Examples is a reusable Python snippet. Common regex patterns for email validation, URL extraction, and text parsing. The full implementation: import re # Email validation email_pattern = r'^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,} re.match(email_pattern, "user@example.com") # Match # Extract URLs from text text = "Visit https://example.com and http://test.org" urls = re.findall(r'https?://[^\s]+', text) # ["https://example.com", "http://test.org"] # Replace all non-alphanumeric clean = re.sub(r'[^a-zA-Z0-9\s]', '', "Hello, World! #2024") # "Hello World 2024" # Named groups pattern = r'(?P \d{3})-(?P \d{3})-(?P \d{4})' m = re.search(pattern, "Call 555-123-4567 today!") m.groupdict() # {"area": "555", "prefix": "123", "num": "4567"} # Split on multiple delimiters re.split(r'[,;|]', "a,b;c|d") # ["a", "b", "c", "d"] It belongs to the Regex Module area of the standard library. This snippet uses only the Python standard library with no third-party dependencies, so it runs on any modern Python 3 interpreter. Browse more patterns in the snippet library, or paste the code straight into the playground to experiment with it.