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方法一,使用线程中现成的:
这种一般比较常用,特别是在线程中的使用方法,下面是一个例子能够很清楚的说明它的具体使用方法:
#! /usr/bin/python3 #! -*- conding: utf-8 -*- import threading import time def fun_timer(): print(time.strftime('%y-%m-%d %h:%m:%s')) global timer timer = threading.timer(2,fun_timer) timer.start(); timer = threading.timer(1,fun_timer) timer.start(); time.sleep(5) timer.cancel() print(time.strftime('%y-%m-%d %h:%m:%s'))
方法二,根据time中的来定义timer:
这种方法使用比较灵活,可根据自身的东西来添自身的需求:
import time class timererror(exception): """a custom exception used to report errors in use of timer class""" class timer: def __init__(self): self._start_time = none def start(self): """start a new timer""" if self._start_time is not none: raise timererror(f"timer is running. use .stop() to stop it") self._start_time = time.perf_counter() def stop(self): """stop the timer, and report the elapsed time""" if self._start_time is none: raise timererror(f"timer is not running. use .start() to start it") elapsed_time = time.perf_counter() - self._start_time self._start_time = none print(f"elapsed time: {elapsed_time:0.4f} seconds")
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