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本文实例为大家分享了python实现倒计时小工具的具体代码，供大家参考，具体内容如下

#!/usr/bin/env python
# coding=utf-8
 
import threading
import time
import Queue
from Tkinter import *
import tkMessageBox
import logging
logging.basicConfig(level=logging.INFO)
 
## Communication queue
commQueue = Queue.Queue()
g_time = 0
 
## Function run in thread
def timeThread():
 global g_time
 g_time = timeVar.get() * 60
 while 1:
 logging.info("线程放入队列:%d".decode("utf-8") % g_time)
 commQueue.put(g_time)
 try:
  root.event_generate('<<TimeChanged>>', when='tail')
 except TclError:
  break
 time.sleep(1)
 g_time -= 1
 if g_time==-1:
  begin_btn["fg"] = "black"
  clockVar.set("开始计时")
  break
 
def timeChanged(event):
 x = commQueue.get()
 logging.info("获取队列:%d".decode("utf-8") % x)
 minits = x//60
 seconds = x%60
 s = "剩余时间 {:02}:{:02}".format(minits, seconds)
 begin_btn["fg"] = "blue"
 clockVar.set(s)
 if x==0:
  tkMessageBox.showinfo("提醒","时间已到")
 
 
def clock_func(*args):
 global g_time
 if threading.activeCount()>1:
 g_time = timeVar.get() * 60
 else:
 th=threading.Thread(target=timeThread)
 th.start()
 
## Create main window
root = Tk()
root.title("计时工具")
root.geometry("180x95-0-45")
root.resizable(width=FALSE,height=FALSE)
root.wm_attributes("-topmost",1)
frame = Frame(root)
frame.pack()
Label(frame,text="设定时间间隔").grid(row=1,column=2)
timeVar = IntVar()
clockVar = StringVar()
time_entry = Entry(frame, textvariable=timeVar, width=8)
time_entry["justify"] = "center"
time_entry.grid(row=2,column=2,sticky="W,E")
begin_btn = Button(frame,textvariable=clockVar,command=clock_func)
begin_btn.grid(row=3,column=2)
timeVar.set(8)
begin_btn["fg"] = "black"
clockVar.set("开始计时")
 
for child in frame.winfo_children():
 child.grid_configure(pady=3)
 
time_entry.focus()
root.bind('<<TimeChanged>>', timeChanged)
root.bind("<Return>",clock_func)
root.mainloop()

小编再为大家分享一段代码：Python窗口倒计时

# Countdown using Tkinter 
from tkinter import *
import time
import tkinter.messagebox
 
class App:
 def __init__(self,master):
  frame = Frame(master)
  frame.pack()
  self.entryWidget = Entry(frame)
  self.entryWidget["width"] = 15
  self.entryWidget.pack(side=LEFT)
  self.hi_there = Button(frame, text="开始", command=self.start)
  self.hi_there.pack(side=LEFT)
  self.button = Button(frame, text="退出", fg="red", command=frame.quit)
  self.button.pack(side=LEFT)
  
 def start(self):
  text = self.entryWidget.get().strip()
  if text != "":
   num = int(text)
   self.countDown(num)
  
 def countDown(self,seconds):
  lbl1.config(bg='yellow')
  lbl1.config(height=3, font=('times', 20, 'bold'))
  for k in range(seconds, 0, -1):
   if k == 30:
    print("\a")
   if k== 29:
    print("\a")
   if k== 28:
    print("\a")
   lbl1["text"] = k
   root.update()
   time.sleep(1)
  lbl1.config(bg='red')
  lbl1.config(fg='white')
  lbl1["text"] = "时间到！"
  tkMessageBox.showinfo("时间到！","时间到！")
 
 def GetSource():
  get_window = Tkinter.Toplevel(root)
  get_window.title('Source File?')
  Tkinter.Entry(get_window, width=30,
      textvariable=source).pack()
  Tkinter.Button(get_window, text="Change",
      command=lambda: update_specs()).pack()
 
root = Tk()
root.title("Countdown")
lbl1 = Label()
lbl1.pack(fill=BOTH, expand=1)
app = App(root)
root.mainloop()

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持【听图阁-专注于Python设计】。