Programming Articles - Page 1211 of 3363

A variable in Tkinter is used to store the values of any data. For a Tkinter application, we can store the values in two ways −by defining the value programmatically, orby storing the value through user Input.A normal variable can be used to set the value for any application whenever it is required. However, we can take the user input by creating an instance of the StringVar() object. When we specify a Tkinter variable such as textvariable, for a widget (textvariable = myvar), the widget automatically gets updated whenever the value of the variable changes. However, there might be times ... Read More

The Tkinter window can be resized manually by defining the geometry ("width × height") method. We can automate or reset the window to its original form by passing an empty value to the geometry manager. Once the empty value is passed to the method, it will get resized automatically. In this example, we will create a Tkinter application that will display a Toplevel window (Popup window) with a defined size. When we press a RESET button, it will be resized again to its default size.Example#Import the library from tkinter import * from tkinter import ttk #Create an instance of ... Read More

Lamda Functions (also referred to as Anonymous Function in Python) are very useful in building Tkinter GUI applications. They allow us to send multiple data through the callback function. Lambda can be inside any function that works as an anonymous function for expressions. In Button Command, lambda is used to pass the data to a callback function.ExampleIn this example, we will create an application that will have some buttons in it. The button command is defined with the lambda function to pass the specific value to a callback function.#Import the library from tkinter import * from tkinter import ttk ... Read More

There might be times when we need to take the user input in our Tkinter application. We can get the user Input in a Single Line text input through the Entry widget using get() method. To display the Captured input, we can either print the message on the screen or display the input with the help of the Label widget.Example#Import the required Libraries from tkinter import * from tkinter import ttk #Create an instance of Tkinter frame win= Tk() #Set the geometry of Tkinter frame win.geometry("750x250") def display_text():    global entry    string= entry.get()    label.configure(text=string) ... Read More

Tkinter LabelFrame is similar to Frames in Tkinter Library. It works like a container where widgets can be placed. LabelFrame initially creates a container with some rectangular border around it. In order to style the LabelFrame widget, we have several style options such as background, borderwidth, labelanchor, highlightcolor and many more.ExampleIn this example, we will see the LabelFrame widget and its properties.#Import required libraries from tkinter import * #Create an instance of tkinter frame win= Tk() #Define the geometry of the window win.geometry("750x250") #Initialize a LabelFrame Widget labelframe= LabelFrame(win, text= "Frame 01", width= 600, height= 200, labelanchor= "n", font= ('Helvetica ... Read More

Tkinter is one of the Python-based libraries used to create and develop Desktop User interfaces and applications. Using the Tkinter library and its packages, we will create a Rock Paper Scissor Game Application. The game can be played between two people using hand gestures. The condition for winning the game is, If player A gets Paper and Player B gets scissors, then Scissor wins.If player A gets Paper and Player B gets Rock, then Paper wins.Similarly, If player A gets Rock and Player B gets scissors, then Rock wins.Following these game conditions, we will first create the GUI for the game user interface. The ... Read More

Oftentimes, we need to deal with plots in our Tkinter GUI-based application. To support the plots for the available data points, Python provides a Matplotlib package that can be imported into the application easily. In order to add a plot for the given data points, we have to install several other packages such as NumPy along with Matplotlib. NumPy is a Python library that helps to deal with scientific calculation in the Data.ExampleIn this example, we will create data points for the car prices starting from (100000) with the units in the range of 1000 to 5000.#Import the required Libraries ... Read More

The Menu Bar in Tkinter can be created by initializing Menu (parent) instances in the application. We can add checkbuttons in place of add_command to extend the feature of Menu Bar in any application.To add the menu items using the add_checkbutton(label, options) method, we first initialize a Menu Bar. Once the MenuBar is defined, we can give the value of menu items by using Checkbuttons. The CheckButtons can be used to add the list of Menu Items or options. Checkbuttons are nothing but the Boolean widget, which validates a particular value by making it True or False. To mark the ... Read More

Tkinter ListBox widget is generally used for creating a list of items in the form of a list. The items can be chosen through the mouse buttons whenever we click a particular List Item. Each item in the ListBox is configured with the default color, which can be changed by defining the ‘background’ and ‘foreground’ color in itemconfig(options) method.ExampleIn this example, we will create a ListBox that contains a list of items. We will provide different colors to a few of the list items.#Import required libraries from tkinter import * #Create an instance of tkinter frame win= Tk() #Define ... Read More

In order to close or remove any widget in an existing Tkinter application, we can use the destroy() method. It terminates the widget process abruptly within the program. The method can be invoked with the specific widget we want to close.ExampleIn this example, we will create a button to remove the Label Widget from the application.#Import required libraries from tkinter import * from tkinter import ttk #Create an instance of Tkinter frame win= Tk() #Define the geometry of the window win.geometry("750x250") #Define a function to destroy the label widget def close_widget():    label.destroy() #Create a label label= Label(win, text= ... Read More