Categorize Password as Strong or Weak using Regex in Python

# Categorizing password as Strong or 
# Weak in Python using Regex 


import re 


# Function to categorize password 
def password(v): 

    # the password should not be a 
    # newline or space 
    if v == "\n" or v == " ": 
        return "Password cannot be a newline or space!"

    # the password length should be in 
    # between 9 and 20 
    if 9 <= len(v) <= 20: 

        # checks for occurrence of a character 
        # three or more times in a row 
        if re.search(r'(.)\1\1', v): 
            return "Weak Password: Same character repeats three or more times in a row"

        # checks for occurrence of same string 
        # pattern( minimum of two character length) 
        # repeating 
        if re.search(r'(..)(.*?)\1', v): 
            return "Weak password: Same string pattern repetition"

        else: 
            return "Strong Password!"

    else: 
        return "Password length must be 9-20 characters!"

# Main method 
def main(): 

    # Driver code 
    print(password("Qggf!@ghf3")) 
    print(password("Gggksforgeeks")) 
    print(password("aaabnil1gu")) 
    print(password("Aasd!feasn")) 
    print(password("772*hd897")) 
    print(password(" ")) 


# Driver Code 
if __name__ == '__main__': 
    main()