How to use for loop and add one day (timedelta) every time

Question

Here is my code:

import datetime

date = datetime.date(2015,10,1)
today = datetime..today()
oneday = datetime.timedelta(days = 1)

date_counter = 0
while not date == today:
    date_counter+=1
    date += oneday

In this code I use while loop to achieve my goal--to count the days between today and the specific day chosen by users.

However, I want to use for loop to do the same thing. Can it rewrite by for?

Answer 1

Subtraction of dates makes a timedelta:

import datetime
date = datetime.date(2015,10,1)
today = datetime.date.today()
date_counter = (today - date).days

If you really want to use a for loop, however, you can do this:

import datetime

date = datetime.date(2015,10,1)
today = datetime.date.today()
one_day = datetime.timedelta(days=1)

date_counter = 0

def gen_dates(some_date):
    while some_date != today:
        some_date += one_day
        yield some_date

for d in gen_dates(date):
    date_counter += 1
    print(date_counter, ':', d)