ephem 日历库
import ephem import datetime now_datetime = datetime.datetime.now() now_ephem = ephem.Date(now_datetime) print "Datetime: ", now_datetime print "Ephem : ", now_ephem '%f' % ephem.Date('2013/12/20 12:34:56') => '41627.024259' '%f' % ephem.Date('2013/12/20 12:34:56.1') => '41627.024260'