sqlalchemy filter by comparing datetime.now() and column default date

I doubt that (datetime.now() - datetime.now()).days works since datetime.datetime instance only have attribute named day rather than days. Using datetime.now().days would result in AttributeError: 'datetime.datetime' object has no attribute 'days'

You might try this:

from datetime import timedelta

res = session.query(Object).filter(
    (Object.created_date+timedelta(days=1))>datetime.now())