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python每天在指定时间段运行程序及关闭程序
场景
程序需要在每天某一时间段内运行，然后在某一时间段内停止该程序。
程序：
from datetime import datetime, time
import multiprocessing
from time import sleep
# 程序运行时间在白天8:30 到 15:30 晚上20:30 到 凌晨 2:30
DAY_START = time(8, 30)
DAY_END = time(15, 30)
NIGHT_START = time(20, 30)
NIGHT_END = time(2, 30)
def run_child():
while 1:
print("正在运行子进程")
def run_parent():
print("启动父进程")
child_process = None # 是否存在子进程
while True:
current_time = datetime.now().time()
running = False # 子进程是否可运行
if DAY_START <= current_time <= DAY_END or (current_time >= NIGHT_START) or (current_time <= NIGHT_END):
# 判断时候在可运行时间内
running = True
# 在时间段内则开启子进程
if running and child_process is None:
print("启动子进程")
child_process = multiprocessing.Process(target=run_child)
child_process.start()
print("子进程启动成功")
# 非记录时间则退出子进程
if not running and child_process is not None:
print("关闭子进程")
child_process.terminate()
child_process.join()
child_process = None
print("子进程关闭成功")
sleep(5)
if __name__ == '__main__':
run_parent()python定时程序（每隔一段时间执行指定函数）
import os
import time
def print_ts(message):
print "[%s] %s"%(time.strftime("%Y-%m-%d %H:%M:%S", time.localtime()), message)
def run(interval, command):
print_ts("-"*100)
print_ts("Command %s"%command)
print_ts("Starting every %s seconds."%interval)
print_ts("-"*100)
while True:
try:
# sleep for the remaining seconds of interval
time_remaining = interval-time.time()%interval
print_ts("Sleeping until %s (%s seconds)..."%((time.ctime(time.time()+time_remaining)), time_remaining))
time.sleep(time_remaining)
print_ts("Starting command.")
# execute the command
status = os.system(command)
print_ts("-"*100)
print_ts("Command status = %s."%status)
except Exception, e:
print e
if __name__=="__main__":
interval = 5
command = r"ls"
run(interval, command)