从python中的地址中删除电子邮件域[重复]

正则表达式怎么样?

import re

def extract_user(address):
    result = re.search(r'([\w\d\.]+)@[\w\d\.]+', address)

    if result and address.count('@') == 1:
        return result.group(1)

    else:
        raise ValueError(f'{address} is not a validly formatted e-mail address.')

extract_user('john.doe@generic.com')

输出:

'john.doe'

您可以简单地使用:

prompt.split("@")[0]