timer-fun.py

from PyQt4 import QtGui
from PyQt4 import QtCore
from PyQt4.QtCore import pyqtSlot,SIGNAL,SLOT
import sys
                                                          # They're defining a class that extends LCD, so they can create
class myLCDNumber(QtGui.QLCDNumber):                      # a function to allow the LCD to change itself
  value = 60
    
  @pyqtSlot()                                             # I don't think you need to worry about this line
  def count(self):                                        # Here's the important bit, defining a method that changes the LCD's value on execution
    self.display(self.value)
    self.value = self.value-1


def main():    
    app      = QtGui.QApplication(sys.argv)
    lcdNumber     = myLCDNumber()                       # Note they create an instance of THEIR LCD, not the QT one

    #Resize width and height
    lcdNumber.resize(250,250)    
    lcdNumber.setWindowTitle('PyQt QLcdNumber Countdown Example')  
    
    timer = QtCore.QTimer()

        # So I have no idea WHY but the API appears to be (in arg order
        # 1. the function to sync to
        # 2. the signal that function will send that triggers the sync
        # 3  the object that we will call a method of when we sync
        # 4. some weird syntax for the method we will call on that object
        
        # So your code is failing because your LCD class has no count() function!
        # You need to do the same as them, create a class that extends LCD and adds a function named count() (or rename it)
    lcdNumber.connect(timer,SIGNAL("timeout()"),lcdNumber,SLOT("count()"))
    timer.start(1000) 

    lcdNumber.show()    
    sys.exit(app.exec_())

if __name__ == '__main__':
    main()