Python uses regular expressions to verify that passwords must contain uppercase and lowercase letters and numbers

A program that verifies that the password is legitimate.

　

Enter a password

　

1, length 5-10 bit

　

2, the password must contain, uppercase letters, small letters and numbers

　　

3. Enter up to 5 times

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Problems encountered:

1. Use regular expressions to verify that the password must contain uppercase and lowercase letters and numbers, which are not required in the format of the number of characters, and are valid after validation.

^(?:(? =.*[a-z]) (? =.*[a-z]) (? =.*[0-9])). *$

If the number of words for the password is required, the format is:

^(?:(? =.*[a-z]) (? =.*[a-z]) (? =.*[0-9])). {5,10}$

Use Re.match for validation in Python, return match value if compliant, or none if not

Re.match ("^ (?:(? =.*[a-z] (? =.*[a-z]) (? =.*[0-9])). *$ ", pwd) ==none:

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The code is as follows:

Python uses regular expressions to verify that passwords must contain uppercase and lowercase letters and numbers