validate iranian national code (pytohn)

nationalcode.py

def validate_iranian_national_code(code):
    code_len = len(code)
    if code_len > 10 or code_len < 8:
        return False

    if len(set(code)) == 1:
        return False

    if len(code) < 10:
        code = code.zfill(10)

    factors = [10, 9, 8, 7, 6, 5, 4, 3, 2]
    checksum = sum(int(code[i]) * factors[i] for i in range(len(code) - 1))
    remainder = checksum % 11
    last_digit = int(code[-1])

    if remainder < 2:
        return remainder == last_digit
    else:
        return 11 - remainder == last_digit


# Test cases
print(validate_iranian_national_code(code="5998613771"))
print(validate_iranian_national_code(code="4398013083"))
print(validate_iranian_national_code(code="0000000000"))