In this article we will see how we can border to the drop arrow of the combo box. Drop arrow is basically a push button which when get pressed opens the list view. Below is the representation of normal combo box vs the combo box whose drop arrow are having border. 
In order to do so we have to change the style sheet associated with the combo box, below is the style sheet code
QComboBox::drop-arrow
{
border : 2px solid green;
}
Below is the implementation
Python3
# importing librariesfrom PyQt5.QtWidgets import *from PyQt5 import QtCore, QtGuifrom PyQt5.QtGui import *from PyQt5.QtCore import *import sysclass Window(QMainWindow): def __init__(self): super().__init__() # setting title self.setWindowTitle("Python ") # setting geometry self.setGeometry(100, 100, 600, 400) # calling method self.UiComponents() # showing all the widgets self.show() # method for widgets def UiComponents(self): # creating a combo box widget self.combo_box = QComboBox(self) # setting geometry of combo box self.combo_box.setGeometry(200, 150, 150, 30) # geek list geek_list = ["Sayian", "Super Sayian", "Super Sayian 2", "Super Sayian B"] # adding list of items to combo box self.combo_box.addItems(geek_list) # setting style sheet code of combo box # adding border to the drop arrow self.combo_box.setStyleSheet("QComboBox::down-arrow" "{" "border : 2px solid green;" "}")# create pyqt5 appApp = QApplication(sys.argv)# create the instance of our Windowwindow = Window()# start the appsys.exit(App.exec()) |
Output : 
