How to realize simple countdown function in python

This article introduces the knowledge of "how to realize the simple countdown function in python". In the operation of actual cases, many people will encounter such a dilemma, so let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

The details are as follows:

Use tkinter to make the interface to realize the countdown function.

Use time.sleep (1) to achieve a second countdown

Use threads to avoid interface jams

Detect global flag bits in the thread's loop to ensure that the timing thread is reset and exited

Use pyinstaller-F file.py-w to generate exe files,-w to hide the console, and-F to generate a single file

The code is as follows:

#! / usr/bin/python3.8#-*-coding: utf-8-*-# @ Time: 2021-4-19 14 Author @ Author: dongdong# @ File: CountdownGUI.py# @ Software: PyCharmfrom tkinter import * import timeimport threadingdef cyclethread (): global counttime global restartflag global runflag restartflag=False if (timestr.get (). Isdigit ()): counttime = int (timestr.get ()) * 60 else: runflag=False return While (1): if (restartflag): counttime= int (timestr.get ()) * 60 restartflag=False if (exitflag): sys.exit () counttime=counttime-1 v='left time:'+str (counttime//60) +':'+ str (counttime%60) textshow.set (v) root.update () if (counttime