python计算时间差

import datetime
time_start = datetime.datetime(2018, 7, 1,1,1,4)
print("开始时间：" + time_start.strftime('%Y.%m.%d-%H:%M:%S'))
time_end = datetime.datetime(2018, 7, 2,2,3,3)
print("结束时间：" + time_end.strftime('%Y.%m.%d-%H:%M:%S'))
time_all=(time_end-time_start).total_seconds()
m,s=time_all//60,time_all%60
h,m=m//60,m%60
print("花费时间：" + str(h)+"小时"+str(m)+"分钟"+str(s)+"秒")