Python でとある日付から今日まで何日か取得するメモ

(python2.7.11)

In [10]: import datetime

In [11]: date = datetime.datetime.strptime('2016-01-01', '%Y-%m-%d')

In [12]: date.today()
Out[12]: datetime.datetime(2016, 3, 8, 16, 7, 57, 767309)

In [13]: d = date.today() - date

In [14]: d.days
Out[14]: 67