了解 Python 中的正则表达式：一个实际示例

<code class="python">from sqlalchemy.orm import validates
import re

class Customer:
    @validates('first_name', 'last_name', 'mobile')
    def validate(self, key, value):
        if key in ('first_name', 'last_name'):
            if not value:
                raise ValueError(f'验证错误：{"名字" if key == "first_name" else "姓氏"}不能为空')
        elif key == 'mobile':
            mobile_pattern = r"(((\(\d{3,4}\)\s?)|(\d{3,4}-))\d{3,4}-\d{4})|(\d{10,12})"
            mobile_regex = re.compile(mobile_pattern)
            if not mobile_regex.fullmatch(value):
                raise ValueError('验证错误：无效的手机号码')
        return value</code>

<code class="python">mobile_pattern = r"(((\(\d{3,4}\)\s?)|(\d{3,4}-))\d{3,4}-\d{4})|(\d{10,12})"</code>

<code class="python">mobile_regex = re.compile(mobile_pattern)
if not mobile_regex.fullmatch(value):
    raise ValueError('验证错误：无效的手机号码')</code>