Python 2.7.2+ (default, Jul 20 2012, 22:15:08)
[GCC 4.6.1] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import datetime
>>> datetime.datetime.now
<built-in method now of type object at 0x7fd0aca0a760>
>>> datetime.datetime.now()
datetime.datetime(2013, 1, 14, 21, 11, 3, 186215)
>>> datetime.datetime.now() - datetime.timedelta(days=2)
datetime.datetime(2013, 1, 12, 21, 12, 34, 832335)
Does that help?