python定时器
1、指定时间,每天定时运行
def func(): main_fun() ##主要的函数 #如果需要循环调用,就要添加以下方法 timer = threading.Timer(86400, func) #timer = threading.Timer(180, func) timer.start() if __name__ == '__main__': spmcs_conn = cx_Oracle.connect('%s','nbadv','%s',encoding = "UTF-8",nencoding = "UTF-8") cur = spmcs_conn.cursor() now_time = datetime.datetime.now() now_day = now_time.date().day # 获取明天时间 next_time = now_time + datetime.timedelta(days=+1) next_year = next_time.date().year next_month = next_time.date().month next_day = next_time.date().day # 获取明天3点时间 #next_time = datetime.datetime.strptime(str(next_year)+"-"+str(next_month)+"-"+str(next_day)+" 03:00:00", "%Y-%m-%d %H:%M:%S") next_time = datetime.datetime.strptime(str(next_year)+"-"+str(next_month)+"-"+str(next_day)+" 07:00:00", "%Y-%m-%d %H:%M:%S") # # 获取昨天时间 # last_time = now_time + datetime.timedelta(days=-1) # 获取距离明天3点时间,单位为秒 timer_start_time = (next_time - now_time).total_seconds() #print(timer_start_time) # 54186.75975 #if timer_start_time >= 0: #定时器,参数为(多少时间后执行,单位为秒,执行的方法) timer = threading.Timer(timer_start_time, func) timer.start()
2、隔一定时间运行程序
import datetime import time def doSth(): # 把爬虫程序放在这个类里 print(u'这个程序要开始疯狂的运转啦') # 一般网站都是1:00点更新数据,所以每天凌晨一点启动 def main(h=1,m=0): while True: now = datetime.datetime.now() # print(now.hour, now.minute) if now.hour == h and now.minute == m: doSth() # 每隔60秒检测一次 time.sleep(60) main()
import time from apscheduler.schedulers.background import BackgroundScheduler def job(): print(time.strftime('%Y-%m-%d %H:%M:%S', time.localtime(time.time()))) if __name__ == '__main__': # BackgroundScheduler: 适合于要求任何在程序后台运行的情况,当希望调度器在应用后台执行时使用 scheduler = BackgroundScheduler() # 采用非阻塞的方式 # 采用corn的方式 scheduler.add_job(job, 'cron', day_of_week='fri', second='*/5') ''' year (int|str) – 4-digit year month (int|str) – month (1-12) day (int|str) – day of the (1-31) week (int|str) – ISO week (1-53) day_of_week (int|str) – number or name of weekday (0-6 or mon,tue,wed,thu,fri,sat,sun) hour (int|str) – hour (0-23) minute (int|str) – minute (0-59) econd (int|str) – second (0-59) start_date (datetime|str) – earliest possible date/time to trigger on (inclusive) end_date (datetime|str) – latest possible date/time to trigger on (inclusive) timezone (datetime.tzinfo|str) – time zone to use for the date/time calculations (defaults to scheduler timezone) * any Fire on every value */a any Fire every a values, starting from the minimum a-b any Fire on any value within the a-b range (a must be smaller than b) a-b/c any Fire every c values within the a-b range xth y day Fire on the x -th occurrence of weekday y within the month last x day Fire on the last occurrence of weekday x within the month last day Fire on the last day within the month x,y,z any Fire on any matching expression; can combine any number of any of the above expressions ''' scheduler.start() # 其他任务是独立的线程 while True: print('main-start:', time.strftime('%Y-%m-%d %H:%M:%S', time.localtime(time.time()))) time.sleep(2) print('main-end:', time.strftime('%Y-%m-%d %H:%M:%S', time.localtime(time.time())))
##https://www.jianshu.com/p/b77d934cc252
上面的链接里讲述了很多定时器
from apscheduler.schedulers.blocking import BlockingScheduler from datetime import datetime def job(): print(datetime.now().strftime("%Y-%m-%d %H:%M:%S")) scheduler = BlockingScheduler() scheduler.add_job(job,"cron",hour ='8',minute= '59') scheduler.start()