TypeError: descriptor 'date' requires a 'datetime.datetime' object but received a 'int'

Change your import statement from:

from datetime import datetime

to

import datetime

As when you say from datetime import datetime you are just importing one method and that and not the whole module. And you haven't imported the date method. You could also do this:

>>> from datetime import date
>>> date(2018, 9, 20)
datetime.date(2018, 9, 20)