Python Tkinter – Entry Widget

Python offers multiple options for developing a GUI (Graphical User Interface). Out of all the GUI methods, Tkinter is the most commonly used method. Python with Tkinter is the fastest and easiest way to create GUI applications. Creating a GUI using Tkinter is an easy task.
In Python3 Tkinter is come preinstalled But you can also install it by using the command: 
 

pip install tkinter

Example: Now let’s create a simple window using Tkinter
 

# creating a simple tkinter window
# if you are using python2 
# use import Tkinter as tk  

import tkinter as tk


root = tk.Tk()
root.title("First Tkinter Window")
root.mainloop()

Output :
 

The Entry Widget

The Entry Widget is a Tkinter Widget used to Enter or display a single line of text. 
 

Syntax : 

entry = tk.Entry(parent, options)

Parameters: 
 

1) Parent: The Parent window or frame in which the widget to display.
2) Options: The various options provided by the entry widget are: 
 

• bg : The normal background color displayed behind the label and indicator. 
• bd : The size of the border around the indicator. Default is 2 pixels. 
• font : The font used for the text. 
• fg : The color used to render the text. 
• justify : If the text contains multiple lines, this option controls how the text is justified: CENTER, LEFT, or RIGHT. 
• relief : With the default value, relief=FLAT. You may set this option to any of the other styles like : SUNKEN, RIGID, RAISED, GROOVE 
• show : Normally, the characters that the user types appear in the entry. To make a .password. entry that echoes each character as an asterisk, set show=”*”. 
• textvariable : In order to be able to retrieve the current text from your entry widget, you must set this option to an instance of the StringVar class.

Methods: The various methods provided by the entry widget are: 

• get() : Returns the entry’s current text as a string. 
• delete() : Deletes characters from the widget 
• insert ( index, ‘name’) : Inserts string ‘name’ before the character at the given index. 
   

Example: 
 

# Program to make a simple 
# login screen  


import tkinter as tk
 
root=tk.Tk()

# setting the windows size
root.geometry("600x400")
 
# declaring string variable
# for storing name and password
name_var=tk.StringVar()
passw_var=tk.StringVar()

 
# defining a function that will
# get the name and password and 
# print them on the screen
def submit():

    name=name_var.get()
    password=passw_var.get()
    
    print("The name is : " + name)
    print("The password is : " + password)
    
    name_var.set("")
    passw_var.set("")
    
    
# creating a label for 
# name using widget Label
name_label = tk.Label(root, text = 'Username', font=('calibre',10, 'bold'))
 
# creating a entry for input
# name using widget Entry
name_entry = tk.Entry(root,textvariable = name_var, font=('calibre',10,'normal'))
 
# creating a label for password
passw_label = tk.Label(root, text = 'Password', font = ('calibre',10,'bold'))
 
# creating a entry for password
passw_entry=tk.Entry(root, textvariable = passw_var, font = ('calibre',10,'normal'), show = '*')
 
# creating a button using the widget 
# Button that will call the submit function 
sub_btn=tk.Button(root,text = 'Submit', command = submit)
 
# placing the label and entry in
# the required position using grid
# method
name_label.grid(row=0,column=0)
name_entry.grid(row=0,column=1)
passw_label.grid(row=1,column=0)
passw_entry.grid(row=1,column=1)
sub_btn.grid(row=2,column=1)
 
# performing an infinite loop 
# for the window to display
root.mainloop()

Output : 
 

Python Tkinter – Entry Widget – FAQs

What is the Use of Entry Widget in Tkinter Python? 

The Entry widget in Tkinter is used for entering or displaying a single line of text. It is commonly used in forms, dialogs, and for other input fields where the user is expected to input a short text string. This widget allows for basic text input from the user, such as names, addresses, or small numerical inputs.

How to Make an Entry in Tkinter?

Creating an Entry widget in Tkinter involves initializing the widget and then placing it on the main window or any other parent widget using layout managers like pack, grid, or place.

Example:

import tkinter as tk

root = tk.Tk()

entry = tk.Entry(root, width=20)
entry.pack()

root.mainloop()

What is the Difference Between Entry and Text Widget?

• Entry Widget: It is used for single-line text inputs. It’s best for forms where the user inputs a small amount of text, such as a username or password.
• Text Widget: This widget is used for multi-line text input. It allows for the editing of multiline text documents, formatting text, and other complex text operations, which makes it suitable for text editors.

How to Create a Text Input in Tkinter?

To create a basic text input field in Tkinter, you can use the Entry widget for single-line input or the Text widget for multi-line input.

Example using Text Widget:

import tkinter as tk

root = tk.Tk()

text_input = tk.Text(root, height=5, width=20)
text_input.pack()

root.mainloop()

What is the Readonly Entry Widget Used For?

A readonly Entry widget is used in scenarios where you want to display information that the user can select and copy but not modify. This is useful in applications where data integrity is crucial but the user needs to be able to see and interact with the data.

Example of Creating a Readonly Entry Widget:

import tkinter as tk

root = tk.Tk()

readonly_entry = tk.Entry(root, width=20)
readonly_entry.insert(0, "Read-only text")
readonly_entry.config(state='readonly')
readonly_entry.pack()

root.mainloop()

In this configuration, the user can see and copy the text from the entry but cannot change it, maintaining the data’s integrity while still providing interaction capability.

R

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