PyQt5 – Get the root model index of ComboBox

In this article we will see how we can get the root model index of the combo box. Root model index can be set/changed with the help of setRootModelIndex method, this sets the root model index for the items of the combo box, in order to get the root model index we use rootModelIndex method.

Syntax : combo_box.rootModelIndex() Argument : It takes no argument Return : It returns QModelIndex object

Below is the implementation – 

Python3

# importing libraries
from PyQt5.QtWidgets import *
from PyQt5 import QtCore, QtGui
from PyQt5.QtGui import *
from PyQt5.QtCore import *
import sys


class 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)
        # creating a model
        model = QtGui.QStandardItemModel(0, 1)

        # creating a item
        item = QtGui.QStandardItem("New model")

        # adding item to the model
        model.appendRow(item)

        # setting model to the combo box
        self.combo_box.setModel(model)

        # geek list
        geek_list = ["Sayian", "Super Sayian", "Super Sayian 2",
                                               "Super Sayian B"]

        # making it editable
        self.combo_box.setEditable(True)

        # adding list of items to combo box
        self.combo_box.addItems(geek_list)

        # getting root model index
        root_index = self.combo_box.rootModelIndex()

        # creating label to show root model index
        label = QLabel("R.M.I = " + str(root_index), self)

        # setting geometry to the label
        label.setGeometry(200, 100, 300, 30)


# create pyqt5 app
App = QApplication(sys.argv)

# create the instance of our Window
window = Window()

# start the app
sys.exit(App.exec())

Output :