Remove QComboBox listView shadow effect

Question

By default, the QComboBox listview has shadow effect. Is there a way to remove it? Is the shadow controlled from QStyle or in some other way?

Answer 1

Okay, that might be working for someone who has themes without shadow effects but I have them, so I finally found a simple way to make it work.

self.comboBox.findChild(QFrame).setWindowFlags(Qt.Popup | Qt.NoDropShadowWindowHint)

combobox has one QFrame inside. Its window effect makes the shadow. We can erase that effect with the aforementioned line. Careful, don't put both, otherwise you won't open the popup.

I know it's been a while since this post was made but I haven't found any other solutions.