[PyKDE] setText of all LineEdits with button click

[Bill Burns]

I'm trying to make one button click set the text to "hi" on all four LineEdits 
in the code below. So far I'm able to pass the string "hi" to the function 
set() in the class MyLineEdit but it will not set the text of the LineEdits. 
What am I doing wrong? 

I'm not a programmer. I just found PyQt about two weeks ago, found it 
fascinating and have been "tooling" around with it every since!

TIA

Bill

Here are some of my specifications:
Suse 9.1
kernel-default-2.6.5-7.108
python-2.3.3-85
qt3-3.3.1-36.16
PyQt-3.11-17
sip-3.10.1-16

Here's the code I'm trying to make work:

#!/usr/bin/env python

import os
import sys

from qt import *

class MyLineEdit(QLineEdit): 
    
    def __init__(self, parent):
        QLineEdit.__init__(self, parent)
            
    def set(self, txt):
        #print txt
        self.setText(txt)
        
class MainWindow(QMainWindow):

    def __init__(self):
        QMainWindow.__init__(self)
                
        self.grid=QGrid(2, self)
        self.grid.setFrameShape(QFrame.StyledPanel)
        self.setCentralWidget(self.grid)

        self.le0=MyLineEdit(self.grid)
        self.le1=MyLineEdit(self.grid)
        self.le2=MyLineEdit(self.grid)
        self.le3=MyLineEdit(self.grid)      
     
        self.bn1=QPushButton("Set Text", self.grid)
        self.connect(self.bn1, SIGNAL("clicked()"), self.setLineEdit)   
        
    def setLineEdit(self):
        MyLineEdit(self).set("hi")     
    
def main(args):
    app=QApplication(args)
    win=MainWindow()
    win.show()
    app.connect(app, SIGNAL("lastWindowClosed()"), app, SLOT("quit()"))
    app.exec_loop()
  
if __name__=="__main__":
    main(sys.argv)