What is the usage of Combobox in Python?

In Python, a Combobox is a user interface widget used to display a dropdown menu for user selection. Before using a Combobox, it is necessary to import the appropriate library (such as Tkinter).

The general usage of Combobox is as follows:

1. To create a Combobox object, you first need to specify the parent window and option list parameters.
2. Create a drop-down menu with options ‘option1’, ‘option2’, and ‘option3’ within the parent window using a ttk Combobox.
3. Setting default value: The default value of the Combobox can be set using the set method.
4. Set the combobox to ‘option1’.
5. Bind event handlers: You can use the bind method to connect events (such as option changes) with their respective event handling functions.
6. Create a binding between the combobox and the event_handler function for when the combobox is selected.
7. Display Combobox: Add the Combobox to the parent window using pack or grid methods and make it visible.
8. Pack the combobox.
9. To get the selected value: The get method can be used to retrieve the currently selected value.
10. The combobox value that has been chosen is stored in the variable selected_value.

By following the above steps, you can use Combobox in Python to create a dropdown menu, set default values, bind event handling functions, and retrieve the selected value.