How to Add Values to a Combobox in Python

In this step-by-step tutorial, we’ll be learning about how to add values to Combobox using Python. The Combobox widget, which is a part of the tkinter library in Python, provides a drop-down menu with pre-defined options.

Manipulating the options in the Combobox, such as adding, modifying, or deleting items, can be extremely useful in your software or application.

Step 1: Import Necessary Libraries

Before we begin, we first need to import the necessary Python libraries. For creating Combobox widget in Python, we’ll be utilizing the tkinter and ttk libraries.

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import tkinter as tk
from tkinter import ttk

Step 2: Create a Root GUI Window

Next, we’ll create a root GUI window using tkinter.

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root = tk.Tk()
root.title("Combobox Tutorial")

Step 3: Define a Combobox

We proceed to define our Combobox. We’ll also specify a default value from the options list for the Combobox to display when the application loads.

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n = tk.StringVar()
choices = ['Option 1', 'Option 2', 'Option 3']
combobox = ttk.Combobox(root, width=27, textvariable=n)
combobox['values'] = choices
combobox.grid(column=0, row=0)
combobox.current(0)

Step 4: Display the GUI

Lastly, we need to add the following code to make it run until the root window is closed.

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root.mainloop()

Full Code

Before we conclude, let’s have a look at what the full Python code looks like:

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import tkinter as tk
from tkinter import ttk
 
root = tk.Tk()
root.title("Combobox Tutorial")
 
n = tk.StringVar()
choices = ['Option 1', 'Option 2', 'Option 3']
combobox = ttk.Combobox(root, width=27, textvariable=n)
combobox['values'] = choices
combobox.grid(column=0, row=0)
combobox.current(0)
 
root.mainloop()

Conclusion

To summarize, we have successfully added the values to a Combobox using Python. This tutorial only gave a basic overview of how to interact with the Combobox widget.

In practice, you can do much more with the different functional capabilities of the Combobox widget, such as handling events, modifying the look, and configuring the size.