class HelloWidget(QWidget):

  def __init__(self, *args):
    apply(QWidget.__init__, (self,) + args)
    la = QLabel(self.tr("Hello World"), self)
    la.setFont(QFont("lcfont", 12, QFont.Normal))
    cmda = QPushButton("Bye", self)
    self.setMinimumSize(160,50)
    self.setMaximumSize(220,100)
    la.setGeometry(40,20,120,30)
    cmda.setGeometry(80,60,40,30)
    self.connect(cmda, SIGNAL("clicked()"), self.close)