如何在Python中测试正则表达式密码? [英] How to test a regex password in Python?

问题描述

在Python中使用正则表达式，如何验证用户密码为:

Using a regex in Python, how can I verify that a user's password is:

• 至少8个字符
• 必须限制于，但不特别要求以下任何一项:
  • 大写字母:A-Z
  • 小写字母:a-z
  • 数字:0-9
  • 任何特殊字符:@#$％^& + =
  • At least 8 characters
  • Must be restricted to, though does not specifically require any of:
    • uppercase letters: A-Z
    • lowercase letters: a-z
    • numbers: 0-9
    • any of the special characters: @#$%^&+=

    注意，所有字母/数字/特殊字符都是可选的.我只想验证密码的长度至少为8个字符，并且限制为字母/数字/特殊字符.用户可以根据自己的意愿选择一个更强/更弱的密码. 到目前为止，我所拥有的是:

    Note, all the letter/number/special chars are optional. I only want to verify that the password is at least 8 chars in length and is restricted to a letter/number/special char. It's up to the user to pick a stronger / weaker password if they so choose. So far what I have is:

    import re
    pattern = "^.*(?=.{8,})(?=.*\d)(?=.*[a-z])(?=.*[A-Z])(?=.*[@#$%^&+=]).*$"
    password = raw_input("Enter string to test: ")
    result = re.findall(pattern, password)
    if (result):
        print "Valid password"
    else:
        print "Password not valid"
    

    推荐答案

    import re
    password = raw_input("Enter string to test: ")
    if re.match(r'[A-Za-z0-9@#$%^&+=]{8,}', password):
        # match
    else:
        # no match
    

    {8,}的意思是至少8". .match函数要求整个字符串与整个正则表达式匹配，而不仅仅是一部分.

    The {8,} means "at least 8". The .match function requires the entire string to match the entire regex, not just a portion.

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