>>> import datetime
>>> now_dt = datetime.datetime.now()
>>> now_dt
datetime.datetime(2017, 3, 1, 12, 11, 47, 52669)
>>> str(now_dt)
'2017-03-01 12:11:47.052669'
>>> now_str = str(now_dt).split('.').pop(0)
>>> now_str
'2017-03-01 12:11:47'
>>> now_dt2 = datetime.datetime.strptime(now_str, '%Y-%m-%d %H:%M:%S')
>>> now_dt2
datetime.datetime(2017, 3, 1, 12, 0, 47)
>>>