Running multiple commands when a button is pressed in Tkinter

The Button widget provides a way to communicate through all the existing functionalities of an application. We can perform a certain action with the help of a Button that encapsulates the function and the objects. However, there might be cases when we want to perform multiple operations with a single button. This can be achieved by defining the lambda functions which target multiple events or callback in the application.

Example

In this example, we will add multiple events to a specific Button.

#Import the Tkinter Library
from tkinter import *

#Create an instance of Tkinter Frame
win = Tk()

#Set the geometry of window
win.geometry("700x350")

#Define functions
def display_msg():
   label.config(text="Top List of Programming Language")

def show_list():
   listbox= Listbox(win, height=10, width= 15, bg= 'grey', activestyle= 'dotbox',font='aerial')
   listbox.insert(1,"Go")
   listbox.insert(1,"Java")
   listbox.insert(1,"Python")
   listbox.insert(1,"C++")
   listbox.insert(1,"Ruby")
   listbox.pack()
   button.destroy()

#Create a Label widget to display the message
label= Label(win, text= "", font= ('aerial 18 bold'))
label.pack(pady= 20)

#Define a Button widget
button= Button(win, text= "Click Here",command= lambda:[display_msg(), show_list()])
button.pack()
win.mainloop()

Output

Running the above code will display a window containing a button.

When we click the Button, it will perform two tasks in parallel. It will display a window containing a Label widget and a List of strings.