Development/Tutorials/Python-hello world

    From KDE TechBase
    Revision as of 09:50, 15 August 2010 by Tstaerk (talk | contribs)

    This is an example application in python using KDE bindings. It builds up two buttons. You need a layout for this, that is also demonstrated. One button exits the program, the other button does a trivial action as a demo, in this case, print "hello world" to the console (more exactly: to stdout).


    from PyQt4.QtGui import * from PyQt4.QtCore import * import sys

    def greet():

     print ("hello world")
    
    1. First we create a QApplication and QPushButton

    app=QApplication(sys.argv)

    win = QWidget() qgl = QGridLayout(win) button1=QPushButton(win) button2=QPushButton(win) button1.setText("greet") button2.setText("exit") qgl.addWidget(button1) qgl.addWidget(button2)

    1. Connect buttons to actions

    QObject.connect(button1,SIGNAL("clicked()"),greet) QObject.connect(button2,SIGNAL("clicked()"),app.exit)

    win.show()

    1. Start the evnt loop

    sys.exit(app.exec_())