How to use the Treeview widget to display hierarchical data in Tkinter Python

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by vsasikalabe dot icon Updated: Jul 7, 2023

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The Tkinter library works with a Tkinter application. The tkinter import * command imports the library. The import * defines all the functions and built-in modules in the tkinter library. We can use these inbuilt methods in a particular application without importing them. We can construct an application using the Tkinter library widgets, functions, and methods. We must import tkinter as tk.import tkinter.ttk as ttk from tkinter.  


The Tkinter module plays a pivotal role. It is much needed to import the Tkinter module for initiating further applications. The main difference is that widget options for widget styling are no longer present. Like the text and canvas widgets, the treeview widget uses tags to modify the item's appearance in the tree.  


Python OS system function runs a command in the Python script, like running in the Shell. A graphical user interface (GUI) is an interface of a desktop. It communicates with computers. It performs various activities on desktop computers, laptops, and other mobile devices. The Treeview widget's purpose is to present a hierarchical structure of the folder. The user can move the mouse to show or hide any part of the structure.  


The parent items are added in the Treeview widget. The os.path.expander () function is used to expand a pathname. It represents the current user's home directory. This may be performed on any platform where users have a home directory. The window.mainloop() triggers Python to run the Tkinter event loop. This method is used for events, such as button clicks or keypresses. It blocks some codes after the running process until we close the window.  


The Treeview widget supports horizontal and vertical scrolling. It is per the options described in Scrollable Widget Options and the methods. Treeview instance Creates a new item and returns the item identifier of the created item. This method returns an empty string when the item specified is a top-level item. Otherwise, it returns the iid of that item's parent. Tkinter Treeview is a tabular data representation. It has all the properties of the table. Every item has a textual label, an optional image, and a list of data values. When we select a row and press the edit or delete button, it will perform the operations defined in the program.  


To use themed widgets, we need to use the class of the Tkinter module. Tkinter Treeview consists of the GUI toolkit tk. It provides an object-oriented approach for using it as part of the development. Adding or removing nodes helps when you want to and is very useful for many GUI applications. We can also create a Treeview scrollbar.  


Here is an example of how to use the Treeview widget to display hierarchical data in Tkinter Python: