[PyQt] doubt with QtCore.QThread

[Pradnyesh Sawant]

Hello,
I have this code, which seems to be correct, but will not run :((
##################################################
import sys
from PyQt4 import QtCore, QtGui
class Tmp(QtGui.QDialog, QtCore.QThread):
    def __init__(self, parent = None):
        QtGui.QDialog.__init__(self, parent)
        QtCore.QThread.__init__(self)
    def run(self):
        print 'Test inside run :)'####

if __name__ == '__main__':
    app = QtGui.QApplication(sys.argv)
    t = Tmp()
    t.show()
    t.start()
    sys.exit(app.exec_())
##################################################
the error it gives is:
AttributeError: start
although, 'print dir(t)' shows start to be an element of t
-- 
warm regards,
Pradnyesh Sawant
--
There are two kinds of people: those who do the work, and those who take 
the credit. Try to be in the first group; there is less competition there. 
--Indira Gandhi