combobox - GitPress.io

Example Python program combobox.py This program creates a PyQt GUI Python version 3.x or newer. To check the Python version use:

python --version

Modules

import sys
from PyQt5.QtWidgets import QApplication, QWidget, QPushButton, QHBoxLayout
from PyQt5.QtWidgets import QComboBox

Classes

class MyWidget(QWidget):

Methods

def init(self):
def init_ui(self):
def main():

Code

Example Python PyQt program :

import sys
from PyQt5.QtWidgets import QApplication, QWidget, QPushButton, QHBoxLayout
from PyQt5.QtWidgets import QComboBox


class MyWidget(QWidget):
    def __init__(self):
        super().__init__()
        self.init_ui()

    def init_ui(self):
        # https://www.tutorialspoint.com/pyqt/pyqt_qcombobox_widget.htm

        # create combo box
        cbox = QComboBox()

        # add new items
        cbox.addItem("C++") # default item
        cbox.addItem("Java")
        cbox.addItem("Python")
        item = ["C", "Ruby", "JavaScript"]
        cbox.addItems(item)

        # get item index
        cbox.currentIndexChanged.connect(lambda index:
                                         print({
                                             0: lambda: "select C++",
                                             1: lambda: "select Java",
                                             2: lambda: "select Python",
                                             3: lambda: "select C",
                                             4: lambda: "select Ruby",
                                             5: lambda: "select JavaScript"
                                         }.get(index)()))

        # layout combo box
        hbox = QHBoxLayout()
        hbox.addWidget(cbox)
        self.setLayout(hbox)
        self.setWindowTitle("test ComboBox")
        self.setGeometry(10, 10, 400, 500)
        self.show()


def main():
    app = QApplication(sys.argv)
    widget = MyWidget()
    sys.exit(app.exec_())

if __name__ == '__main__':
    main()

Useful Links

Articles: https://python-commandments.org/
PyQt: https://pythonpyqt.com/
Tutorial: https://pythonprogramminglanguage.com/