python 定时器,轮询定时器的实例
python 定时器默认定时器只执行一次，第一个参数单位S，几秒后执行
import threading
def fun_timer():
print('Hello Timer!')
timer = threading.Timer(1, fun_timer)
timer.start()
改成以下可以执行多次
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)
调用
t = LoopTimer(120, fun_timer) t.start()
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