The timedelta object from the datetime module allows you to subtract any number of days from a date object.
In this example I always take the current date using the date.today() method.
Then I set a timedelta of 2 days and subtract it from the current_date.
from datetime import timedelta, date
current_date = date.today()
print(current_date)
past_date = current_date - timedelta(days=2)
print(past_date)2020-04-27
2020-05-25