import datetime
import time

dt = datetime.datetime.now()
# datetime.datetime(2016, 2, 11, 2, 8, 51, 160960)
du = time.mktime(dt.timetuple()) + dt.microsecond*1e-6
# 1455152931.16096
dt2 = datetime.datetime.utcfromtimestamp(du)
# datetime.datetime(2016, 2, 11, 1, 8, 51, 160960)