Python Tkinter Button

In this article we look at the tKinter button

These buttons are able to display text or images that convey the purpose of the buttons. You can attach a function or a method to a button which is called when you click on the button.

The syntax to use the button widget is given below.

Syntax

Parameters

• parent− This represents the parent window.
• options − Here is the list of most commonly used options for this widget. These options can be used as key-value pairs separated by commas.

Methods

Following are commonly used methods for this widget −

Code

Now for some examples

#python application to create a simple button   
from tkinter import *   
 
top = Tk()   
top.geometry("200x100")    
b = Button(top,text = "Simple")  
b.pack()   
top.mainloop()  

and now attach a function when the button is pressed which will display a messagebox

import Tkinter
import tkMessageBox

top = Tkinter.Tk()

def helloCallBack():
   tkMessageBox.showinfo( "Hello Python", "Hello World")

B = Tkinter.Button(top, text ="Hello", command = helloCallBack)

B.pack()
top.mainloop()

from tkinter import *

class Application(Frame):
    def hello(self):
        print ("hello world, I'm tkinter")

    def createGUI(self):
        #a button with red text on a black background 
        #that says EXIT that quits the app
        self.QUIT = Button(self)
        self.QUIT["text"] = "EXIT"
        self.QUIT["fg"]   = "yellow"
        self.QUIT["bg"]   = "black"
        self.QUIT["command"] =  self.quit
        self.QUIT.pack({"side": "left"})
        #a button that will say the contents of hello on
        #the comamnd line
        self.hi_there = Button(self)
        self.hi_there["text"] = "Hello",
        self.hi_there["command"] = self.hello
        self.hi_there.pack({"side": "left"})

    def __init__(self, master=None):
        Frame.__init__(self, master)
        self.pack()
        self.createGUI()

root = Tk()
app = Application(master=root)
app.mainloop()
root.destroy()