How do you create a dropdown box in PyQt5?

9 months ago

Olivia Parker

2 minutes

You can create a drop-down box in PyQt5 using the QComboBox class. Below is a simple example code:

import sys
from PyQt5.QtWidgets import QApplication, QWidget, QVBoxLayout, QComboBox

class ComboBoxExample(QWidget):
    def __init__(self):
        super().__init__()
        self.initUI()

    def initUI(self):
        layout = QVBoxLayout()

        combobox = QComboBox()
        combobox.addItem("Option 1")
        combobox.addItem("Option 2")
        combobox.addItem("Option 3")

        combobox.currentIndexChanged.connect(self.on_combobox_changed)

        layout.addWidget(combobox)
        self.setLayout(layout)

        self.setWindowTitle("ComboBox Example")
        self.show()

    def on_combobox_changed(self, index):
        print("Selected index:", index)

if __name__ == '__main__':
    app = QApplication(sys.argv)
    ex = ComboBoxExample()
    sys.exit(app.exec_())

In this example, we have created a basic drop-down menu and added three options to it. We have also linked the currentIndexChanged signal to the on_combobox_changed method, so that when the selection in the drop-down menu changes, we will print out the current selected index.

You can modify and expand this example according to your own needs.