validar_nif

def validar(dni):
  control = {0:"T",1:"R",2:"W",3:"A",4:"G",5:"M",6:"F",8:"P",9:"D",10:"X",11:"B",12:"N",13:"J",14:"Z",15:"S",16:"Q",17:"V",18:"H",19:"L",20:"C",21:"K",22:"E"}
  if len(dni)!=9:
    return False
  dig = dni[0].upper()
  if dig == "X":
    dig = "0"
  elif dig == "Y":
    dig = "1"
  elif dig == "Z":
    dig = "2"
  try:
    num = int(dig + dni[1:8])
  except:
    return False
  num = num % 23
  if control[num] == dni[-1].upper():
    return True
  else:
    return False

while not validar(input("Introduzca NIF a validar: ")):
  print("NIF inválido, pruebe de nuevo")

print("NIF correcto")