如何用正则表达式写密码规则

最新推荐文章于 2024-01-04 11:40:37 发布

原创最新推荐文章于 2024-01-04 11:40:37 发布 · 918 阅读

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本文介绍了一种使用正则表达式验证密码强度的方法，确保密码至少包含大小写字母及数字，长度不少于六位。

You need to write regex that will validate a password to make sure it meets the follwing criteria:

At least six characters long
contains a lowercase letter
contains an uppercase letter
contains a number

答案：

regex=r"^(?=.*[A-Z])(?=.*[a-z])(?=.*[0-9])[A-Za-z0-9]{6,}$"

^              # begin word
(?=.*?[a-z])   # at least one lowercase letter
(?=.*?[A-Z])   # at least one uppercase letter
(?=.*?[0-9])   # at least one number
[A-Za-z\d]     # only alphanumeric
{6,}           # at least 6 characters long
$              # end word