year and doy to datetime python code example

Example 1: datetimes to day of year python

>>> import datetime
>>> today = datetime.datetime.now()
>>> print today
2009-03-06 15:37:02.484000
>>> today.strftime('%j')
'065'

Example 2: python datetime day of year

from datetime import datetime

day_of_year = datetime.now().timetuple().tm_yday