Password Check

password_strength_check.py

def password_strength(password):
    """
    Verify the strength of 'password'
    Returns a dict indicating the wrong criteria
    A password is considered strong if:
        8 characters length or more
        1 digit or more
        1 symbol or more
        1 uppercase letter or more
        1 lowercase letter or more
    """
    response_code, response_data, error = initalize_values()

    # calculating the length
    length_error = len(password) < 8

    # searching for digits
    digit_error = re.search(r"\d", password) is None

    # searching for uppercase
    uppercase_error = re.search(r"[A-Z]", password) is None

    # searching for lowercase
    lowercase_error = re.search(r"[a-z]", password) is None

    # searching for symbols
    symbol_error = re.search(r"[ !#$%&'()*+,-./[\\\]^_`{|}~"+r'"]', password) is None

    # overall result
    password_ok = not ( length_error or digit_error or uppercase_error or lowercase_error or symbol_error )

    if password_ok:
        response_data = 'Success'
        response_code = 200
    else:
        response_code = 400
        error_pre_text = 'Password must have '
        if length_error:
            error = error_pre_text+'8 characters length or more'
        elif digit_error:
            error = error_pre_text+'1 digit or more'
        elif uppercase_error:
            error = error_pre_text+'1 uppercase letter or more'
        elif lowercase_error:
            error = error_pre_text+'1 lowercase letter or more'
        elif symbol_error:
            error = error_pre_text+'1 symbol or more'
    return response_code, response_data, error