python thread timer Timer (32)

Relative front of several python thread content, the content of the film is relatively simple, timer - as the name implies, necessarily for regular tasks.

Guard against shock

A Thread Timer Timer principle

Principle is simple, after a specified time interval start thread! Applicable scene: the completion of regular tasks, such as: timed reminder - alarm clock and so on.

# Import the thread module 
Import Threading
 
timer = threading.Timer(interval, function, args=None, kwargs=None)

Parameter Description:

interval The - interval timer, task timer is started after an interval of how many seconds (unit: seconds);

function - thread function;

args - thread parameters can pass data tuple type, default is empty (default parameters);

kwargs - thread parameters, data dictionaries can pass, default is empty (default parameters);

II. Use a timer thread

Usage scenarios: Alarm,

# !usr/bin/env python
# -*- coding:utf-8 _*-
"""
@Author:何以解忧
@Blog(个人博客地址): shuopython.com
@WeChat Official Account(微信公众号)：猿说python
@Github:www.github.com
 
@File:python_timer.py
@Time:2019/10/22 21:25
 
@Motto:不积跬步无以至千里，不积小流无以成江海，程序人生的精彩需要坚持不懈地积累！
"""
 
# 导入线程模块
import threading
 
def thread_Timer():
    print("该起床啦...5秒之后再次呼叫你起床...")
 
    # 声明全局变量
    global t1
    # 创建并初始化线程
    t1 = threading.Timer(5,thread_Timer)
    # 启动线程
    t1.start()
 
 
if __name__ == "__main__":
    # 创建并初始化线程
    t1 = threading.Timer(5, thread_Timer)
    # 启动线程
    t1.start()

Output:

Get out of bed ... 5 seconds after the call again you get up ...
Get out of bed ... 5 seconds after the call again you get up ...
Get out of bed ... 5 seconds after the call again you get up ...
Get out of bed ... 5 seconds after the call again you get up ...
Get out of bed ... 5 seconds after the call again you get up ...
Get out of bed ... 5 seconds after the call again you get up ...
Get out of bed ... 5 seconds after the call again you get up ...
Get out of bed ... 5 seconds after the call again you get up ...
Get out of bed ... 5 seconds after the call again you get up ...

Code analysis:

In the main thread creates a thread timer, perform thread_Timer thread function after 5 seconds, and when thread_Timer end of the function, but also set a timer thread thread_Timer, which completed a recursive operation, repeat the timing interval of 5 seconds task!

III. Key summary

There are many ways to interact with the thread of the thread so far has explained the thread mutex Lock , thread the event Event , thread condition variable for condition Condition , thread timer Timer, different needs, use may be different, flexible use!