Number of 15 minutes intervals between two datetimes

from datetime import datetime, timedelta

now = datetime.now()
start = now + timedelta(minutes = 15)
finish = start + timedelta(minutes = 30)

How can I find the number of 15 minutes intervals exist between start and finish?

>Solution :

from datetime import datetime, timedelta

now = datetime.now()
start = now + timedelta(minutes = 15)
finish = start + timedelta(minutes = 30)

elapsed = finish - start
number_of_intervals = elapsed / timedelta(minutes=15)

elapsed is the timedelta between start and finish. Divide by 15 minutes to calculate how many 15 minute intervals fit in there.

Note that this returns a float, so includes fractional intervals. Round as appropriate.