在行中找到Python regex和几个命名组

import re

date_pattern = r"(?P<year>\d{4})-(?P<month>\d{2})-(?P<day>\d{2})"
date_string = "2022-01-01"

match = re.match(date_pattern, date_string)
if match:
    year = match.group("year")
    month = match.group("month")
    day = match.group("day")
    print(f"Year: {year}, Month: {month}, Day: {day}")

import re

email_pattern = r"(?P<username>\w+)@(?P<domain>\w+\.\w+)"
email_string = "example@example.com"

match = re.match(email_pattern, email_string)
if match:
    username = match.group("username")
    domain = match.group("domain")
    print(f"Username: {username}, Domain: {domain}")