Python GUI Tkinter

 Ø Introduction

1. Tkinter is Python’s built-in GUI library
2. It is used to create desktop applications
3. It works on Windows, Linux, and macOS

Ø 2. Importing Tkinter

4. Tkinter is imported using import tkinter as tk
5. No external installation is required
6. Tkinter comes with standard Python

Ø Main Window

7. The main window is created using tk.Tk()
8. It is usually stored in a variable named root
9. All widgets are placed inside this window

Ø Window Properties

10. The window title is set using root.title()
11. Window size is set using root.geometry()
12. Geometry uses width × height format

Ø Widgets

13. Widgets are GUI components
14. The label widget displays text
15. The button widget performs actions

Ø User Input

16. The entry widget is used for input
17. User data is read using. get()
18. Entry widgets are common in forms

Ø Layout Management

19. Widgets must be placed on the window
20. .pack() is the simplest layout method
21. .grid() arranges widgets in rows and columns

Ø Styling

22. Colors are set using fg and bg
23. Fonts are defined using tuples
24. Padding adds spacing around widgets

Ø Event Handling

25. Button actions are linked with functions
26. Events respond to user interaction
27. command= is used for button events

Ø Main Loop

28. GUI runs using an event loop
29. The loop starts with root.mainloop()
30. Without it, the window closes immediately