I tried the code posted by larsmans above but, there are a couple of problems:
1) The code as is will throw the error as mentioned by mauguerra 2) If you change the code to the following:
... d1 = d1.strftime("%Y-%m-%d") d2 = d2.strftime("%Y-%m-%d") return abs((d2 - d1).days)
This will convert your datetime objects to strings but, two things
1) Trying to do d2 - d1 will fail as you cannot use the minus operator on strings and 2) If you read the first line of the above answer it stated, you want to use the - operator on two datetime objects but, you just converted them to strings
What I found is that you literally only need the following:
import datetime end_date = datetime.datetime.utcnow() start_date = end_date - datetime.timedelta(days=8) difference_in_days = abs((end_date - start_date).days) print difference_in_days