python regex for password validation

Question

I have the following requirement to validate the password with below context

• at least one digit
• at least one uppercase letter
• at least one lowercase letter
• at least one special character[$@#]

Below program is doing the partial match but not the full regex

#!/usr/sfw/bin/python
import re
password = raw_input("Enter string to test: ")
if re.match(r'[A-Za-z0-9@#$]{6,12}', password):
    print "match"
else:
    print "Not Match"

In use:

localhost@user1$ ./pass.py
Enter string to test: abcdabcd
match

It is evaluating the wrong output. Can anyone suggest here should I use re.search ?

Answer 1

Here is the Regex for at least one digit, one uppercase letter, at least one lowercase letter, at least one special character

import re
password = input("Enter string to test: ")
# Add any special characters as your wish I used only #@$
if re.match(r"^(?=.*[\d])(?=.*[A-Z])(?=.*[a-z])(?=.*[@#$])[\w\d@#$]{6,12}$", password):
    print ("match")
else:
    print ("Not Match")

Hope this will Help You...