Password Strength Checker


import re

def check_password_strength(password):
    length_error = len(password) < 8
    digit_error = re.search(r"\d", password) is None
    uppercase_error = re.search(r"[A-Z]", password) is None
    lowercase_error = re.search(r"[a-z]", password) is None
    symbol_error = re.search(r"[!@#$%^&*(),.?\":{}|<>]", password) is None

    score = 5
    score -= length_error
    score -= digit_error
    score -= uppercase_error
    score -= lowercase_error
    score -= symbol_error

    if score == 5:
        strength = "Very Strong"
    elif score >= 4:
        strength = "Strong"
    elif score >= 3:
        strength = "Medium"
    elif score >= 2:
        strength = "Weak"
    else:
        strength = "Very Weak"

    print(f"Password strength: {strength}")

    if length_error:
        print("- Password should be at least 8 characters.")
    if digit_error:
        print("- Password should include at least one digit.")
    if uppercase_error:
        print("- Password should include at least one uppercase letter.")
    if lowercase_error:
        print("- Password should include at least one lowercase letter.")
    if symbol_error:
        print("- Password should include at least one special character.")

def main():
    print("--- Password Strength Checker ---")
    pwd = input("Enter a password to check: ")
    check_password_strength(pwd)

if __name__ == "__main__":
    main()


--- Password Strength Checker ---
Enter a password to check: Pass123
Password strength: Weak
- Password should be at least 8 characters.
- Password should include at least one special character.