Calculate no of days between two datetimesΒΆ

Calculate no of days between two datetimes.
import datetime
from datetime import datetime

def differ_days(date1, date2):
    a = date1
    b = date2
    return (a - b).days

print(differ_days((datetime(2016,10,12,0,0,0)), datetime(2015,12,10,0,0,0)))
print(differ_days((datetime(2016,10,12,0,0,0)), datetime(2015,12,10,23,59,59)))

Output:

307
306