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Introduction to Tkinter

  • Difficulty Level : Easy
  • Last Updated : 22 May, 2020

Graphical User Interface(GUI) is a form of user interface which allows users to interact with computers through visual indicators using items such as icons, menus, windows, etc. It has advantages over the Command Line Interface(CLI) where users interact with computers by writing commands using keyboard only and whose usage is more difficult than GUI.

What is Tkinter?

Tkinter is the inbuilt python module that is used to create GUI applications. It is one of the most commonly used modules for creating GUI applications in Python as it is simple and easy to work with. You don’t need to worry about the installation of the Tkinter module separately as it comes with Python already. It gives an object-oriented interface to the Tk GUI toolkit.

Some other Python Libraries available for creating our own GUI applications are

  • Kivy
  • Python Qt
  • wxPython

      Among all Tkinter is most widely used

      What are Widgets?

      Widgets in Tkinter are the elements of GUI application which provides various controls (such as Labels, Buttons, ComboBoxes, CheckBoxes, MenuBars, RadioButtons and many more) to users to interact with the application.

      Fundamental structure of tkinter program



      Basic Tkinter Widgets:



      WidgetsDescription
      LabelIt is used to display text or image on the screen
      ButtonIt is used to add buttons to your application
      CanvasIt is used to draw pictures and others layouts like texts, graphics etc.
      ComboBoxIt contains a down arrow to select from list of available options
      CheckButtonIt displays a number of options to the user as toggle buttons from which user can select any number of options.
      RadiButtonIt is used to implement one-of-many selection as it allows only one option to be selected
      EntryIt is used to input single line text entry from user
      FrameIt is used as container to hold and organize the widgets
      MessageIt works same as that of label and refers to multi-line and non-editable text
      ScaleIt is used to provide a graphical slider which allows to select any value from that scale
      ScrollbarIt is used to scroll down the contents. It provides a slide controller.
      SpinBoxIt is allows user to select from given set of values
      TextIt allows user to edit multiline text and format the way it has to be displayed
      MenuIt is used to create all kinds of menu used by an application

        Example




        from tkinter import * 
        from tkinter.ttk import *
            
        # writing code needs to
        # create the main window of 
        # the application creating 
        # main window object named root
        root = Tk()
          
        # giving title to the main window
        root.title("First_Program")
          
        # Label is what output will be 
        # show on the window
        label = Label(root, text ="Hello World !").pack()
          
        # calling mainloop method which is used
        # when your application is ready to run
        # and it tells the code to keep displaying 
        root.mainloop()

        Output

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