import sys

import time

from PyQt4.QtCore import *

from PyQt4.QtGui import *

####################################################################

class MyWindow(QWidget):

def __init__(self, *args):

QWidget.__init__(self, *args)

self.label = QLabel(" ")

layout = QVBoxLayout()

layout.addWidget(self.label)

self.setLayout(layout)

self.connect(self, SIGNAL("didSomething"),

self.update_label)

self.do_something()

def do_something(self):

self.emit(SIGNAL("didSomething"), "important", "information")

def update_label(self, value1, value2):

self.label.setText(value1 + " " + value2)

####################################################################

if __name__ == "__main__":

app = QApplication(sys.argv)

    w = MyWindow() 

    w.show() 

    sys.exit(app.exec_())