Dynamic QLabel PyQt4

#!/usr/bin/env python
from __future__ import unicode_literals
import sys, os, random
from PyQt4 import QtGui, QtCore

from matplotlib.backends.backend_qt4agg import FigureCanvasQTAgg as FigureCanvas
from matplotlib.figure import Figure

progname = os.path.basename(sys.argv[0])
progversion = "0.1"

class MyTextCanvas(FigureCanvas):
    """Ultimately, this is a QWidget (as well as a FigureCanvasAgg, etc.)."""
    def __init__(self, parent=None, width=5, height=4, dpi=100):
        fig = Figure(figsize=(width, height), dpi=dpi)
        self.axes = fig.add_subplot(111)
        # We want the axes cleared every time plot() is called
        self.axes.hold(False)
        self.compute_initial_figure()

        FigureCanvas.__init__(self, fig)
        self.setParent(parent)

        FigureCanvas.setSizePolicy(self,
                                   QtGui.QSizePolicy.Expanding,
                                   QtGui.QSizePolicy.Expanding)
        FigureCanvas.updateGeometry(self)

        ########### I added these things below
        self.text = 'this is the initial text'
        self.create_initial_text()
        ###########

    def compute_initial_figure(self):
        pass

    def create_initial_text(self):
        pass

class myLabelClass(MyTextCanvas):
    """This is my own creaed class which more or less resembles the code above."""
    def __init__(self, *args, **kwargs):
        MyTextCanvas.__init__(self, *args, **kwargs)
        timer = QtCore.QTimer(self)
        QtCore.QObject.connect(timer, QtCore.SIGNAL('timeout()'), self.countUp)
        timer.start(1000)

    def create_initial_text(self):
        QtGui.QLabel(self.text, self)

    def countUp(self):
        for i in xrange(100):
            self.myShinyLabel.setText(str(i))


class ApplicationWindow(QtGui.QMainWindow):
    def __init__(self):
        QtGui.QMainWindow.__init__(self)
        self.setAttribute(QtCore.Qt.WA_DeleteOnClose)
        self.setWindowTitle("Hielke's programma")

        self.main_widget = QtGui.QWidget(self)

        layout = QtGui.QHBoxLayout(self.main_widget)
        self.myShinyLabel = myLabelClass(self.main_widget)
        layout.addWidget(self.myShinyLabel)
        #dynamicImage = MyDynamicMplCanvas(self.main_widget, width=5, height=4, dpi=100)
        #layout.addWidget(dynamicImage)

        self.main_widget.setFocus()
        self.setCentralWidget(self.main_widget)

def main():
    qApp = QtGui.QApplication(sys.argv)
    aw = ApplicationWindow()
    aw.setWindowTitle("%s" % progname)
    aw.show()
    sys.exit(qApp.exec_())


if __name__ == "__main__":
    main()