python 定時器,輪詢定時器
阿新 • • 發佈:2018-12-26
python 定時器預設定時器只執行一次,第一個引數單位S,幾秒後執行
import threading
def fun_timer():
print('Hello Timer!')
timer = threading.Timer(1, fun_timer)
timer.start()
改成以下可以執行多次
建立loop_timer.py
from threading import _Timer class LoopTimer(_Timer): """Call a function after a specified number of seconds: t = LoopTi mer(30.0, f, args=[], kwargs={}) t.start() t.cancel() # stop the timer's action if it's still waiting """ def __init__(self, interval, function, args=[], kwargs={}): _Timer.__init__(self, interval, function, args, kwargs) def run(self): '''self.finished.wait(self.interval) if not self.finished.is_set(): self.function(*self.args, **self.kwargs) self.finished.set()''' while True: self.finished.wait(self.interval) if self.finished.is_set(): self.finished.set() break self.function(*self.args, **self.kwargs)
呼叫
t = LoopTimer(120, fun_timer)
t.start()