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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def start(st_reg_number):
 """Checks the number valiaty for the Espirito Santo state"""


    weights = [9, 8, 7, 6, 5, 4, 3, 2]
    number_state_registration = st_reg_number[0:len(st_reg_number) - 1]
    digit_state_registration = st_reg_number[-1]

    if st_reg_number[0:2] not in ['10', '11', '12']:
        return False

    if len(st_reg_number) != 9:
        return False

    sum_total = 0

    for i in weights:
        sum_total = sum_total + i * (int(number_state_registration[-i+1]))

    check_number = number_state_registration <= 10119997

    if sum_total % 11 == 0:
        return '0' == digit_state_registration

    elif sum_total % 11 == 1 and (int(number_state_registration) >= 10103105 and check_number):
        return '1' == digit_state_registration

    elif sum_total % 11 == 1:
        return '0' == digit_state_registration

    else:
        digit_check = 11 - sum_total % 11
        return digit_state_registration == str(digit_check)

    if number_state_registration == '11094402' and (number_state_registration == '1' or number_state_registration == '0'):
        return True