Create a Python GUI program to close a window

Python tkinter Basic: Exercise-18 with Solution

Write a Python GUI program to create a window that closes when a "Close" button is clicked.

Sample Solution:

Python Code:

import tkinter as tk

# Function to close the window
def close_window():
    parent.destroy()

# Create the main window
parent = tk.Tk()
parent.title("Close Window Example")

# Create a label
label = tk.Label(parent, text="Click the 'Close' button to close this window.")
label.pack(padx=25, pady=25)

# Create a close button
close_button = tk.Button(parent, text="Close", command=close_window)
close_button.pack()

# Start the Tkinter event loop
parent.mainloop()

Explanation:

In the exercise above -

• First we import the 'tkinter' library and create the main window using tk.Tk().
• Next we define a function called "close_window()" that calls root.destroy() to close the main window.
• A label and a "Close" button are added to the window. The button's command parameter is set to 'close_window', so clicking the button will execute the "close_window()" function.
• The program starts the Tkinter event loop using parent.mainloop(), which keeps the GUI window running.

Sample Output:

Flowchart:

Python Code Editor: