import sys, time
from PyQt4 import QtCore, QtGui

class MyApp(QtGui.QWidget):
 def __init__(self, parent=None):
  QtGui.QWidget.__init__(self, parent)

  self.setGeometry(300, 300, 280, 600)
  self.setWindowTitle('threads')

  self.layout = QtGui.QVBoxLayout(self)

  self.testButton = QtGui.QPushButton("test")
  self.connect(self.testButton, QtCore.SIGNAL("released()"), self.test)
  self.listwidget = QtGui.QListWidget(self)

  self.layout.addWidget(self.testButton)
  self.layout.addWidget(self.listwidget)

 def add(self, text):
  """ Add item to list widget """
  print "Add: " + text
  self.listwidget.addItem(text)
  self.listwidget.sortItems()

 def addBatch(self, text="test", iters=6, delay=0.3):
  """ Add several items to list widget """
  for i in range(iters):
   time.sleep(delay)  # artificial time delay
   self.add(text + " " + str(i))

 def threadFunc(self) :
  print 'in threadFunc'

 def test(self):
  self.listwidget.clear()
  ## adding entries just from main application: locks ui
  #self.addBatch("_non_thread", iters=6, delay=0.3)

  ## adding by emitting signal in different thread
  #self.workThread = WorkThread()
  #self.connect( self.workThread, QtCore.SIGNAL("update(QString)"), self.add )
  #self.workThread.start()

  self.genericThread = GenericThread(self.addBatch,"from generic thread ",delay=0.3)
  #self.genericThread = GenericThread()
  self.genericThread.start()

  self.thread2=GenericThread(self.threadFunc)

#class WorkThread(QtCore.QThread):
 #def __init__(self):
  #QtCore.QThread.__init__(self)

 #def run(self,x):
  #print x
  #for i in range(6):
   #time.sleep(0.3) # artificial time delay
   #self.emit( QtCore.SIGNAL('update(QString)'), "from work thread " + str(i) )
  #return


class GenericThread(QtCore.QThread):
 def __init__(self, function, *args, **kwargs):
  QtCore.QThread.__init__(self)
  self.function = function
  self.args = args
  self.kwargs = kwargs
  print '='*50
  print function
  print args
  print kwargs


 def __del__(self):
  self.wait()

 def run(self,x):
  self.function(*self.args,**self.kwargs)
  return

# run
app = QtGui.QApplication(sys.argv)
test = MyApp()
test.show()
app.exec_()