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How to change the Tkinter label text?

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  • Difficulty Level : Easy
  • Last Updated : 22 Jul, 2021

Prerequisites: Introduction to tkinter

Tkinter is a standard GUI (Graphical user interface) package for python. It provides a fast and easy way of creating a GUI application.

To create a tkinter application:

  • Importing the module — tkinter
  • Create the main window (container)
  • Add any number of widgets to the main window.
  • Apply the event Trigger on the widgets.

Widgets are the controlling tools for any GUI application. Here widget’s main role is to provide a good variety of control. Some widgets are buttons, labels, text boxes, and many more. 

One of its widgets is the label, which is responsible for implementing a display box-section for text and images. Click here For knowing more about the Tkinter label widget.

Now, let’ see how To change the text of the label:

Method 1: Using Label.config() method.

Syntax: Label.config(text)

Parameter: text– The text to display in the label. 

This method is used for performing an overwriting over label widget.

Example:

Python3




# importing everything from tkinter
from tkinter import *
 
# creating the tkinter window
Main_window = Tk()
 
# variable
my_text = "GeeksforGeeks updated !!!"
 
# function define for
# updating the my_label
# widget content
def counter():
   
    # use global variable
    global my_text
     
    # configure
    my_label.config(text = my_text)
 
# create a button widget and attached  
# with counter function  
my_button = Button(Main_window,
                   text = "Please update",
                   command = counter)
 
# create a Label widget
my_label = Label(Main_window,
                 text = "geeksforgeeks")
 
# place the widgets
# in the gui window
my_label.pack()
my_button.pack()
 
# Start the GUI
Main_window.mainloop()

 
 Output:

 

 

Method 2: Using StringVar() class.

 

Syntax: StringVar()

Return: String variable object

 This class is used the for setting the values and changing it according to the requirements. 

Python3




# importing everything from tkinter
from tkinter import *
 
# create gui window
Main_window = Tk()
 
# set the configuration
# of the window
Main_window.geometry("220x100")
 
# define a function
# for setting the new text
def java():
    my_string_var.set("You must go with Java")
 
# define a function
# for setting the new text
def python():
    my_string_var.set("You must go with Python")
 
 
 
# create a Button widget and attached  
# with java function  
btn_1 = Button(Main_window,
               text = "I love Android",
               command = java)
 
# create a Button widget and attached  
# with python function
btn_2 = Button(Main_window,
               text = "I love Machine Learning",
               command = python)
 
# create a StringVar class
my_string_var = StringVar()
 
# set the text
my_string_var.set("What should I learn")
 
# create a label widget
my_label = Label(Main_window,
                 textvariable = my_string_var)
 
 
# place widgets into
# the gui window
btn_1.pack()
btn_2.pack()
my_label.pack()
 
# Start the GUI 
Main_window.mainloop()

 

 


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