Assistance for understanding Qthread and Signals. (Pyside)

Assistance for understanding Qthread and Signals. (Pyside)

i am trying to understand how to do a Qthread and i have this skeletal
code. my main objective is to not let the GUI "hang" while the backend is
doing some database stuff and at the same time updating a table widget in
the GUI. background: Doing this on Windows OS. Pyside as the GUI. (I also
tried Python threading, but everytime my application crashes)
class GenericThread(QtCore.QThread):
def __init__(self, function, *args, **kwargs):
QtCore.QThread.__init__(self)
self.function = function
self.args = args
self.kwargs = kwargs
def __del__(self):
self.wait()
def run(self):
self.function(*self.args,**self.kwargs)
return
clas myMainGUI(...)
def add(self):
...
for myfiles in os.listdir(..): <--- intensive process, lots of files
column headers = [ .... ]
result = select_data_from_file(myfiles) <----- database file
processing
self.insert_table_widget ( column headers, result ) <--want
to insert to widge in "realtime" and do other stuff without
GUI getting "hang"
....
self.mythread.emit() <-- ??
def coolie(self): # some button will call this function.
if buttonclick == "add":
self.mythread = GenericThread(self.add)
self.mythread.disconnect() <------??
self.mythread.connect() <------ ??
self.mythread.start()
any idea how should my emit(), connect() or disconnect() be? thanks