Python list of first day of month for given period

Question

I am trying find an efficient way of creating a list of dates only including the first day of the month for a given period. Something like this but better:

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Answer 1

There is no reason to bruteforce this:

import datetime
from pprint import pprint

dt = datetime.date.today()
end = datetime.date(2015, 2, 1)
dates = []

while dt < end:
    if not dt.month % 12:
        dt = datetime.date(dt.year+1, 1, 1)
    else:
        dt = datetime.date(dt.year, dt.month+1, 1)
    dates.append(dt)

pprint(dates)

Output:

[datetime.date(2014, 4, 1),
 datetime.date(2014, 5, 1),
 datetime.date(2014, 6, 1),
 datetime.date(2014, 7, 1),
 datetime.date(2014, 8, 1),
 datetime.date(2014, 9, 1),
 datetime.date(2014, 10, 1),
 datetime.date(2014, 11, 1),
 datetime.date(2014, 12, 1),
 datetime.date(2015, 1, 1),
 datetime.date(2015, 2, 1)]