How to increment date by week?

[Carlos Nepomuceno]

> Date: Tue, 4 Jun 2013 14:31:07 -0700
> Subject: How to increment date by week?
> From: r90230 at gmail.com
> To: python-list at python.org
> 
>    Starting on any day/date, I would like to create a one year list, by week (start date could be any day of week).  Having a numerical week index in front of date, ie 1-52, would be a bonus.  
>    ie, 1.  6/4/2013
>        2.  6/11/2013
>        3.  6/18/2013....etc to # 52.
> 
>    And to save that result to a file.
>    Moving from 2.7 to 3.3
> TIA

YAS:

import datetime
today = datetime.datetime.today()
week  = datetime.timedelta(weeks=1)

f=open('output.txt','w')
for i in range(52):
    f.write((today+i*week).strftime(str(i+1)+'. %Y-%m-%d\n'))
f.close()

 		 	   		  
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