Any half-decent python devs here?

[Rich43]

Sorry for the long thread

Just wondering if any of you knows some WxPython programming

Btw, if you havnt tried python already... I highly recommend it... it can easily match .NET/VB. Love it to bits...


Anyway I have this problem... I am trying to learn Threading in WxPython... argh I hate threads in a lot of languages but im determined to beat them! Python looks promising though!

I am reading this: http://wiki.wxpython.org/index.cgi/LongRunningTasks

It has the following code sample:

import time
from threading import *
import wx

# Button definitions
ID_START = wx.NewId()
ID_STOP = wx.NewId()

# Define notification event for thread completion
EVT_RESULT_ID = wx.NewId()

def EVT_RESULT(win, func):
    """Define Result Event."""
    win.Connect(-1, -1, EVT_RESULT_ID, func)

class ResultEvent(wx.PyEvent):
    """Simple event to carry arbitrary result data."""
    def __init__(self, data):
        """Init Result Event."""
        wx.PyEvent.__init__(self)
        self.SetEventType(EVT_RESULT_ID)
        self.data = data

# Thread class that executes processing
class WorkerThread(Thread):
    """Worker Thread Class."""
    def __init__(self, notify_window):
        """Init Worker Thread Class."""
        Thread.__init__(self)
        self._notify_window = notify_window
        self._want_abort = 0
        # This starts the thread running on creation, but you could
        # also make the GUI thread responsible for calling this
        self.start()

    def run(self):
        """Run Worker Thread."""
        # This is the code executing in the new thread. Simulation of
        # a long process (well, 10s here) as a simple loop - you will
        # need to structure your processing so that you periodically
        # peek at the abort variable
        for i in range(10):
            time.sleep(1)
            if self._want_abort:
                # Use a result of None to acknowledge the abort (of
                # course you can use whatever you'd like or even
                # a separate event type)
                wx.PostEvent(self._notify_window, ResultEvent(None))
                return
        # Here's where the result would be returned (this is an
        # example fixed result of the number 10, but it could be
        # any Python object)
        wx.PostEvent(self._notify_window, ResultEvent(10))

    def abort(self):
        """abort worker thread."""
        # Method for use by main thread to signal an abort
        self._want_abort = 1

# GUI Frame class that spins off the worker thread
class MainFrame(wx.Frame):
    """Class MainFrame."""
    def __init__(self, parent, id):
        """Create the MainFrame."""
        wx.Frame.__init__(self, parent, id, 'Thread Test')

        # Dumb sample frame with two buttons
        wx.Button(self, ID_START, 'Start', pos=(0,0))
        wx.Button(self, ID_STOP, 'Stop', pos=(0,50))
        self.status = wx.StaticText(self, -1, '', pos=(0,100))

        self.Bind(wx.EVT_BUTTON, self.OnStart, id=ID_START)
        self.Bind(wx.EVT_BUTTON, self.OnStop, id=ID_STOP)

        # Set up event handler for any worker thread results
        EVT_RESULT(self,self.OnResult)

        # And indicate we don't have a worker thread yet
        self.worker = None

    def OnStart(self, event):
        """Start Computation."""
        # Trigger the worker thread unless it's already busy
        if not self.worker:
            self.status.SetLabel('Starting computation')
            self.worker = WorkerThread(self)

    def OnStop(self, event):
        """Stop Computation."""
        # Flag the worker thread to stop if running
        if self.worker:
            self.status.SetLabel('Trying to abort computation')
            self.worker.abort()

    def OnResult(self, event):
        """Show Result status."""
        if event.data is None:
            # Thread aborted (using our convention of None return)
            self.status.SetLabel('Computation aborted')
        else:
            # Process results here
            self.status.SetLabel('Computation Result: %s' % event.data)
        # In either event, the worker is done
        self.worker = None

class MainApp(wx.App):
    """Class Main App."""
    def OnInit(self):
        """Init Main App."""
        self.frame = MainFrame(None, -1)
        self.frame.Show(True)
        self.SetTopWindow(self.frame)
        return True

if __name__ == '__main__':
    app = MainApp(0)
    app.MainLoop()

------


I want to split that file into a few modules... something like this:

go.py

import time
from threading import *
import wx
from ResultEvent import ResultEvent
from WorkerThread import WorkerThread

# Button definitions
ID_START = wx.NewId()
ID_STOP = wx.NewId()

# Define notification event for thread completion
EVT_RESULT_ID = wx.NewId()

def EVT_RESULT(win, func):
    """Define Result Event."""
    win.Connect(-1, -1, EVT_RESULT_ID, func)




# GUI Frame class that spins off the worker thread
class MainFrame(wx.Frame):
#gui code here

WorkerThread.py

import time
from threading import *
import wx
from ResultEvent import ResultEvent

# Thread class that executes processing
class WorkerThread(Thread):
#worker thread code here

ResultEvent.py

class ResultEvent(wx.PyEvent):
#result event code here

Edited some of that out to save time... full code at at the top of this thread.

I get a error that says something like this

Exception in thread Thread-1:
Traceback (most recent call last):
  File "C:\Python24\lib\threading.py", line 442, in __bootstrap
    self.run()
  File "C:\coding\Start Menu Organiser\help\WorkerThread.py", line 35, in run
    wx.PostEvent(self._notify_window, ResultEvent(10))
  File "C:\coding\Start Menu Organiser\help\ResultEvent.py", line 11, in __init_
_
    self.SetEventType(EVT_RESULT_ID)
NameError: global name 'EVT_RESULT_ID' is not defined

Im not quite sure how to fix it but I know why... the EVT_RESULT_ID variable isnt getting to the other modules... i need to make this variable accessable to all the threads and classes.

If anyone can tell me how to program this properly... it would help a lot