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cpf-vi.py
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cpf-vi.py
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'''
CPF Validation Instrument
Copyright (C) 2023 ber-bk (https://github.com/ber-bk/cpf-vi)
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
USA
'''
print()
print("--------------------CPF Validation Instrument--------------------")
#verification of the first verification digit
def AlgorithmFirstNine():
MultiplicationFactorsList = [10,9,8,7,6,5,4,3,2]
MultipliedCPF = []
for x in range(9):
MultipliedCPF.append(MultiplicationFactorsList[x]*MappedCPF[x])
if sum(MultipliedCPF)*10%11 == 10:
return 0
else:
return sum(MultipliedCPF)*10%11
#verification of the second verification digit
def AlgorithmFirstTen():
MultiplicationFactorsList = [11,10,9,8,7,6,5,4,3,2]
MultipliedCPF = []
for x in range(10):
MultipliedCPF.append(MultiplicationFactorsList[x]*MappedCPF[x])
if sum(MultipliedCPF)*10%11 == 10:
return 0
else:
return sum(MultipliedCPF)*10%11
while True:
#keeps trying if user mistakenly inputs something other than a number
while True:
try:
print()
print("Insert the CPF with digits only:")
InputCPF = input()
MappedCPF = list(map(int,InputCPF)) #transforming input (string) into a list of integers
except:
print()
input("The CPF must only contain digits. Press Enter to try again.")
print()
else:
break
#in case the number of digits isn't 11, the CPF is invalid
if len(InputCPF) != 11:
print()
print("The CPF is Invalid (The number of digits isn't 11)")
print()
input("Press Enter to do it once more, or Control+C to end")
#in case all digits are the same, the CPF is invalid
elif MappedCPF[0] == MappedCPF[1] and MappedCPF[2] and MappedCPF[3] and MappedCPF[4] and MappedCPF[5] and MappedCPF[6] and MappedCPF[7] and MappedCPF[8] and MappedCPF[9] and MappedCPF[10]:
print()
print("The CPF is Invalid (All digits are the same)")
print()
input("Press Enter to do it once more, or Control+C to end")
#valid CPF
elif AlgorithmFirstNine() == MappedCPF[9] and AlgorithmFirstTen() == MappedCPF[10]:
print()
print("The CPF is Valid")
print()
input("Press Enter to do it once more, or Control+C to end")
#in case the verification fails, the CPF is invalid
else:
print()
print("The CPF is Invalid")
print()
input("Press Enter to do it once more, or Control+C to end")