How to receive more than one user command at one time?

What about:

from datetime import datetime

nasc = input("Informe sua data de nascimento: ")

try:
    obj = datetime.strptime( nasc, '%d%m%Y')
except ValueError:
    obj = None

if obj:
    print("Data Completa: %s" % (obj.strftime('%d/%m/%Y')))
    print("Dia: %s" % (obj.strftime('%d')))
    print("Mes: %s" % (obj.strftime('%m')))
    print("Ano: %s" % (obj.strftime('%Y')))
else:
    print("Data de nascimento invalida!")

Test # 1:

Informe sua data de nascimento: 15112002
Data Completa: 15/11/2002
Dia: 15
Mes: 11
Ano: 2002

Test # 2:

Informe sua data de nascimento: 12345678
Data de nascimento invalida!

Test # 3:

Informe sua data de nascimento: 29021017
Data de nascimento invalida!

The simplest ways to do this are as follows:

nasc is a string, the strings are lists of characters. Then you can divide it by day, month and year.

nasc= input('INFORME SUA DATA DE NASCIMENTO: ')
dia = nasc[0:2]
mes = nasc[2:4]
ano = nasc[4:8]

Or you can use a method that has in its own strings that is split () that returns a string list, then your user must type with some separating character, for example: dd / mm / yyyy

>>> nasc = "20/05/1997"
>>> nasc.split('/')
['20', '05', '1997']