Your first window

Tkinter comes with Python and makes windows with buttons, text boxes and more. Every Tkinter app creates a window and then runs mainloop(), which waits for clicks.

Key points

import tkinter as tk
root = tk.Tk() makes the window
root.mainloop() keeps it open

import tkinter as tk

root = tk.Tk()
root.title("My first app")
root.geometry("320x200")
tk.Label(root, text="Hello from Tkinter!", font=("Arial", 16)).pack(pady=40)
root.mainloop()

Your turn

Run the example. On Ubuntu, install Tkinter first with: sudo apt install python3-tk

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Quiz · +10 XP

Your first window

Key points

What does root.mainloop() do?