Question

Situation:
I am trying to construct a simple method that accepts two different integers that represent two different dates. 20120525 for May 25, 2012 and 20120627 for June 26, 2012 as an example. I want this method to return a list of these integer types that represent all days between the two date parameters.

Question:
Could I get any suggestions on how to do this and how to handle months of either 28, 29, 30 or 31 days in each. I think I can do this by extracting the numbers as integers through division/modding of powers of 10, and then incrementing these numbers as such with the particular conditions above, but I feel like there must be an easier way to do this.

Answer 1

You don’t have to reinvent the wheel. Just parse the strings into datetime objects and let python do the math for you:

from dateutil import rrule
from datetime import datetime

a = '20120525'
b = '20120627'

for dt in rrule.rrule(rrule.DAILY,
                      dtstart=datetime.strptime(a, '%Y%m%d'),
                      until=datetime.strptime(b, '%Y%m%d')):
    print dt.strftime('%Y%m%d')

prints

20120525
20120526
20120527
…
20120625
20120626
20120627