Strings · medium

27. Regular expressions

Validate patterns with re.

Write `is_valid_address(addr)` returning `True` if `addr` matches `0x` followed by exactly 40 hex characters, else `False`. Use the `re` module.

Required in your answer: re.match0x[a-fA-F0-9]{40}

Runs via Pyodide

import re

def is_valid_address(addr):
    # TODO: use re.match with pattern r"^0x[a-fA-F0-9]{40}$"
    pass

Output appears here.