Finding time in Python

In order to properly record the data, I need a timestamp. I found a few minutes this afternoon where I could research it a little. I found two methods:

Using datetime:
>>> from datetime import datetime
>>> current_time = datetime.now()
>>> current_time
datetime.datetime(2015, 1, 31, 15, 35, 14, 21154)

Simple. But there is one slight problem. I'm sure there's a way to do it, but how do you extract just the day, hour, our minute, without any of the other variables?

I would research this more, and probably will, except that I found another solution.

Using time:
>>> from time import strftime,gmtime
>>> strftime("%Y-%m-%d %H:%M:%S", gmtime())
'2015-01-31 20:41:22'
>>> strftime("%Y-%m-%d %H:%M:%S")
'2015-01-31 15:41:26'

In my opinion, this second option is easier. Yes, you need to know date and time codes and formats for Linux, but I've dealt with those for a while, so it shouldn't be an issue for me. For a reference, the codes are found by looking up "man date" in a terminal window in Linux.

In addition to already knowing the date codes, this method also make it possible to set my own preferences in how each timestamp is recorded.