Regular Expression정규표현식

import re

text = "Alice's phone: 010-1234-5678, email: alice@example.com"

# 전화번호 추출
phones = re.findall(r'\d{3}-\d{4}-\d{4}', text)
print(phones)  # ['010-1234-5678']

# 이메일 검증
email_pattern = r'^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}$'
print(bool(re.match(email_pattern, 'alice@example.com')))  # True

# 치환
result = re.sub(r'\d{4}', '****', text)
print(result)  # 숫자 4자리를 ****로 치환