PyQt - benutzerdefinierte Funktion

#!/usr/bin/env python3

# -*- coding: utf-8 -*-

import sys

from PyQt5.QtWidgets import ( QWidget, QPushButton, QHBoxLayout, QVBoxLayout, QApplication, QComboBox )

from PyQt5.QtCore import QCoreApplication

class Example( QWidget ):

    def __init__(self):

        super().__init__()

        self.initUI()

    def initUI(self):

        # Create buttons 

        okButton = QPushButton( "OK" )

        addButton = QPushButton( "add" )

        # connect to events to slots

        addButton.clicked.connect( self.addText )

        okButton.clicked.connect( QCoreApplication.instance().quit )

        combo = QComboBox( self )

        combo.addItem( "oben" )

        combo.addItem( "unten" )

        hbox = QHBoxLayout()

        hbox.addStretch( 1 )

        hbox.addWidget( okButton )

        hbox.addWidget( addButton )

        vbox = QVBoxLayout()

        vbox.addWidget( combo )

        vbox.addStretch( 1 )

        vbox.addLayout( hbox )

        self.setLayout( vbox )

        self.setGeometry( 300, 300, 300, 150 )

        self.setWindowTitle( 'Buttons' )    

        self.show()

    def addText( self ):

        combo.addItem( "neu" )

if __name__ == '__main__':

    app = QApplication( sys.argv )

    ex = Example()

    sys.exit( app.exec_() )