Error of isinstance() types

Question

I have a function that receives a date of birth and another reference date to calculate the age of an individual in reference date. It should return me a list containing how many days, months and years respectively the (a) individual will have.

def calculaIdade(dtNascimento, dtLimite):
    """
    Solução do @[Tomasz Zielinski] e @Williams
    :param dtNascimento:
    :param dtLimite:
    :return: List[dias, meses, anos]
    """
    
    print(f'dtNascimento ({type(dtNascimento)}): {dtNascimento}')
    print(f'dtNascimento ({type(dtLimite)}): {dtLimite}')

    idadeRelativa = relativedelta(dtNascimento, dtLimite)

    return [idadeRelativa.days, idadeRelativa.months, idadeRelativa.years]

To that end, I’m using the library dateutil Python, as you can see in my code above. The problem is that the relativedelta method is returning me a very strange error:

Traceback (most recent call last):
  File "/home/israeldev/Projetos/entrevistaController.py", line 273, in trocaTelaCentral
    calculaAposentadoria = CalculosAposentadoria(self.processoModelo, self.clienteAtual, db=self.db)
  File "/home/israeldev/Projetos/aposentadoria.py", line 56, in __init__
    RegraTransicao.reducaoIdadeMinima: self.regraRedIdadeMinima(),
  File "/home/israeldev/Projetos/aposentadoria.py", line 387, in regraRedIdadeMinima
    idadeCliente = calculaIdade(dataNascimento, self.dibAtual)
  File "/home/israeldev/Projetos/util/dateHelper.py", line 17, in calculaIdade
    idadeRelativa = relativedelta(dtNascimento, dtLimite)
  File "/home/israeldev/Projetos/lib/python3.9/site-packages/dateutil/relativedelta.py", line 114, in __init__
    if not (isinstance(dt1, datetime.date) and
TypeError: isinstance() arg 2 must be a type or tuple of types
dtNascimento (<class 'datetime.datetime'>): 1968-03-28 00:00:00
dtNascimento (<class 'datetime.datetime'>): 2020-06-15 00:00:00

I’m using:

• Python 3.9.5
• Linux (Popos)

Just as a complement, I looked here in the related questions and found some things, but I did not succeed in my solution, probably because I did not understand very well the explanations I found... Below one of them...

https://stackoverflow.com/questions/14681096/typeerror-isinstance-arg-2-must-be-a-type-or-tuple-of-types/44839264

Answer 1

I am not sure what kind of data will be passed on in this role, but follows an example of how relativedelta: