code
import datetime import time import os start_run_time="2020-12-11 15:16:08" print(start_run_time) #开始时间转为秒级时间戳 ts1=time.mktime(time.strptime(start_run_time, '%Y-%m-%d %H:%M:%S')) #当前时间 t2=datetime.datetime.now() #当前日期 ct2 =t2.strftime('%Y-%m-%d %H:%M:%S') #转为秒级时间戳 ts2=time.mktime(time.strptime(ct2, '%Y-%m-%d %H:%M:%S')) #计算持续时间 diff_time=(datetime.datetime.fromtimestamp(ts2)-datetime.datetime.fromtimestamp(ts1)).seconds m, s = divmod(diff_time, 60) h, m = divmod(m, 60) res_diff_time="{:02}:{:02}:{:02}".format(h, m, s) print(res_diff_time)