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How to check which Button was clicked in Tkinter ?

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Hierarchical treeview in Python GUI application

Last Updated :12 Jul, 2025

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Python uses different GUI applications that are helpful for the users while interacting with the applications they are using. There are basically three GUI(s) that python uses namelyTkinter, wxPython, and PyQt. All of these can operate with windows, Linux, and mac-OS. However, these GUI applications have many widgets i.e, controls that are helpful for the user interaction with the application. Some of the widgets are buttons, list boxes, scrollbar, treeview, etc.
Note: For more information, refer to Python GUI – tkinter

Treeview widgets

This widget is helpful in visualizing and permitting navigation over a hierarchy of items. It can display more than one feature of every item in the hierarchy. It can build a tree view as a user interface like in Windows explorer. Therefore, here we will use Tkinter in order to construct a hierarchical treeview in the Python GUI application.
Let's see an example of constructing ahierarchical treeview in Python GUI application.

The GUI would look like below:

Example:

Python

# Python program to illustrate the usage# of hierarchical treeview in python GUI# application using tkinter# Importing tkinterfromtkinterimport*# Importing ttk from tkinterfromtkinterimportttk# Creating app windowapp=Tk()# Defining title of the appapp.title("GUI Application of Python")# Defining label of the app and calling a geometry# management method i.e, pack in order to organize# widgets in form of blocks before locating them# in the parent widgetttk.Label(app,text="Treeview(hierarchical)").pack()# Creating treeview windowtreeview=ttk.Treeview(app)# Calling pack method on the treeviewtreeview.pack()# Inserting items to the treeview# Inserting parenttreeview.insert('','0','item1',text='GeeksforGeeks')# Inserting childtreeview.insert('','1','item2',text='Computer Science')treeview.insert('','2','item3',text='GATE papers')treeview.insert('','end','item4',text='Programming Languages')# Inserting more than one attribute of an itemtreeview.insert('item2','end','Algorithm',text='Algorithm')treeview.insert('item2','end','Data structure',text='Data structure')treeview.insert('item3','end','2018 paper',text='2018 paper')treeview.insert('item3','end','2019 paper',text='2019 paper')treeview.insert('item4','end','Python',text='Python')treeview.insert('item4','end','Java',text='Java')# Placing each child items in parent widgettreeview.move('item2','item1','end')treeview.move('item3','item1','end')treeview.move('item4','item1','end')# Calling main()app.mainloop()

Output:

In the above output, a hierarchical treeview is created. Where,GeeksforGeeks is the parent withComputer Science, GATE papers and Programming Languages as its child. And all the child have their respective attributes attached to them. At last, move() method is called here in order to connect all the children to the parent tree.

How to check which Button was clicked in Tkinter ?

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