Python tkinter label 更新方法

yipeiwu_com5年前Python基础

网上看的两个例子关于tkinter界面更新的,简单易懂,分享一下。

例子_1:

Python tkinter label 更新

代码_1:

from tkinter import Tk, Checkbutton, Label
from tkinter import StringVar, IntVar

root = Tk()

text = StringVar()
text.set('old')
status = IntVar()

def change():
 if status.get() == 1: # if clicked
  text.set('new')
 else:
  text.set('old')

cb = Checkbutton(root, variable=status, command=change)
lb = Label(root, textvariable=text)
cb.pack()
lb.pack()

root.mainloop()

例子_2:

Python tkinter label 更新

代码_2:

from tkinter import *
import time


class StopWatch(Frame):
 '''实现一个秒表部件'''
 msec = 50
 def __init__(self, parent=None, **kw):
  Frame.__init__(self, parent, kw)
  self._start = 0.0
  self._elapsedtime = 0.0
  self._running = False
  self.timestr = StringVar()
  self.makeWidgets()
  self.flag = True
 def makeWidgets(self):
  '''制作时间标签'''
  l = Label(self, textvariable = self.timestr)
  self._setTime(self._elapsedtime)
  l.pack(fill = X, expand = NO, pady = 2, padx = 2)
 def _update(self):
  self._elapsedtime = time.time() - self._start
  self._setTime(self._elapsedtime)
  self._timer = self.after(self.msec, self._update)
 def _setTime(self, elap):
  '''将时间格式改为 分:秒:百分秒'''
  minutes = int(elap/60)
  seconds = int(elap-minutes*60.0)
  hseconds = int((elap - minutes*60.0 - seconds) *100)
  self.timestr.set('%2d:%2d:%2d' %(minutes, seconds, hseconds))
 def Start(self):
  if not self._running:
   self._start = time.time() - self._elapsedtime
   self._update()
   self._running = True
 def Stop(self):
  '''停止秒表'''
  if self._running:
   self.after_cancel(self._timer)
   self._elapsedtime = time.time() - self._start
   self._setTime(self._elapsedtime)
   self._running = False
 def Reset(self):
  '''重设秒表'''
  self._start = time.time()
  self._elapsedtime = 0.0
  self._setTime(self._elapsedtime)


 def stopwatch(self):
  if self.flag == True:
   self.pack(side = TOP)
   Button(self, text = 'start', command = self.Start).pack(side = LEFT)
   Button(self, text = 'stop', command = self.Stop).pack(side = LEFT)
   Button(self, text = 'reset', command = self.Reset).pack(side = LEFT)
   Button(self, text = 'quit', command = self.quit).pack(side = LEFT)  
  self.flag = False


class Watch(Frame):
 msec = 1000
 def __init__(self, parent=None, **kw):
   Frame.__init__(self, parent, kw)
   self._running = False
   self.timestr1 = StringVar()
   self.timestr2 = StringVar()
   self.makeWidgets()
   self.flag = True
 def makeWidgets(self):
  l1 = Label(self, textvariable = self.timestr1)
  l2 = Label(self, textvariable = self.timestr2)
  l1.pack()
  l2.pack()
 def _update(self):
  self._settime()
  self.timer = self.after(self.msec, self._update)
 def _settime(self):
  today1 = str(time.strftime('%Y-%m-%d', time.localtime(time.time())))
  time1 = str(time.strftime('%H:%M:%S', time.localtime(time.time())))
  self.timestr1.set(today1)
  self.timestr2.set(time1)
 def start(self):
  self._update()
  self.pack(side = TOP)

if __name__ == '__main__':
 def main():
  root = Tk()
  root.geometry('250x150')
  frame1 = Frame(root)
  frame1.pack(side = BOTTOM)
  sw = StopWatch(root)
  stpwtch = Button(frame1, text = '秒表', command = sw.stopwatch)
  stpwtch.pack(side = RIGHT)
  mw = Watch(root)
  mywatch = Button(frame1, text = '时钟', command = mw.start)
  mywatch.pack(side = LEFT)
  root.mainloop()
 main()

以上这篇Python tkinter label 更新方法就是小编分享给大家的全部内容了,希望能给大家一个参考,也希望大家多多支持【听图阁-专注于Python设计】。

相关文章

python 多线程重启方法

python 多线程程序运行中,会出现由于异常而导致某线程停止的情况,为了保证程序的稳定运行,需要自动重启down掉的线程. python Threading类有一个setName()的...

对python指数、幂数拟合curve_fit详解

对python指数、幂数拟合curve_fit详解

1、一次二次多项式拟合 一次二次比较简单,直接使用numpy中的函数即可,polyfit(x, y, degree)。 2、指数幂数拟合curve_fit 使用scipy.optimiz...

Python实现七彩蟒蛇绘制实例代码

Python实现七彩蟒蛇绘制实例代码

本文主要研究的是Python编程turtle的实例,绘制一个七彩蟒蛇。。具体如下。 第2周的课后练习里,有一道题目,要求修改“蟒蛇绘制”程序,对Python 蟒蛇的每个部分采用不同颜色,...

Python学习之Anaconda的使用与配置方法

Python学习之Anaconda的使用与配置方法

俗话说‘人生苦短,我有Python',但是如果初学Python的过程中碰到包和Python版本的问题估计会让你再苦一会,我在学习Python的爬虫框架中看到看到了anaconda的介绍,...

Python实现iOS自动化打包详解步骤

Python实现iOS自动化打包详解步骤

可能是最简单的iOS自动化打包方式:无需手动配置证书,无需填写配置文件名称,更无需配置Bundle Identifer,总之无需很多繁琐配置,让打包流程一句命令完成!下面将会分享两种打包...