PyQt5 Tutorial | How to create dependent combo box with QComboBox widgets

In this tutorial, we will learn how to create dependent combo box with PyQt5 in Python.

A combo box (some people called it drop-down) is a graphical control allowing a user to pick an item from a list. Often time, there will be scenario where you want to specify a combo box list depending on a parent value. So in this tutorial, I will walk you through the steps to create a dependent combo box using PyQt5.

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[evadeflow]

Thanks for making this video! I've been away from (Py)Qt for awhile, and your example really helped me remember again how models work in Qt—and how important/necessary they are for 'real' applications.

[tuonglainguyen]

Thank you for your videos. I have a question, if we have a database in closed excelworkbook, how can we populate the data to dependent combobox in python (without opening the workbook)? Could you give a guidence, i'll appreciate. best regards.

[rishavchatterjee]

Hi. I am really new to python. The video above is really helping, I just want to show the second Combobox when I select an item form the first one. By default, it will not show. Can I do that? It will be really helpful if you guide me.