PyQt, Open a Table when a row is selected populating it with the row values

[rarevesselt]

Yes,I intend to add price to my table later but as I have said I need help on how to add items to my comboBoxes from the database such that once, I change value in( Product_name) one comboBox other comboBoxes(product_id) and possibly product_price will change into values in the database.I will update with full code later.