Python 时间运算
import datetime
import time
def wait(timeout_ms, calback=None):
'''等待指定时间
Arguments:
timeout_ms {[type]} -- [等待指定毫秒数]
Keyword Arguments:
calback {[type]} -- [每一秒触发一次回调,回调参数是剩余的秒数] (default: {None})
'''
now = datetime.datetime.now()
endTime = now+datetime.timedelta(milliseconds=timeout_ms)
timespane = endTime-now
while timespane.seconds > 0:
if(calback is not None):
calback(timespane.seconds)
now = datetime.datetime.now()
timespane = endTime-now
time.sleep(1)
def callback(remain_seconds):
print("剩余", remain_seconds)
wait(5, callback)
print('end')
输出结果: 剩余 5 剩余 4 剩余 3 剩余 2 剩余 1 end