Python Forum

Hello all,
I am trying to access Canoe tool using python script. I want to call 'WithEvents' function to make event handler of COM object using pywin32 library, but constantly getting "Value Error:This COM object does not support events" on this line 'WithEvents(self.App.Measurement, CanoeMeasurementEvents)'
Traceback:
File "D:\Meenakshi\ECM\RunTests.py", line 84, in __init__
WithEvents(app.Measurement , MeasurementEvents)
File "C:\Python27\lib\site-packages\win32com\client\__init__.py", line 334, in WithEvents
raise ValueError("This COM object does not support events.")
alueError: This COM object does not support events.

I am using python 2.7, Canoe 8.1 version and pywin32 is 'pywin32-223-cp27-cp27m-win_amd64' . Please help.

import time, os, msvcrt
from win32com import *
from win32com.client import *
from win32com.client.connect import *

def DoEvents():
    pythoncom.PumpWaitingMessages()
    time.sleep(.1)
def DoEventsUntil(cond):
    while not cond():
        DoEvents()

class CanoeSync(object):
    """Wrapper class for CANoe Application object"""
    Started = False
    Stopped = False
    ConfigPath = ""
    def __init__(self):
        app = DispatchEx('CANoe.Application')    
        app.Configuration.Modified = False
        ver = app.Version
        print('Loaded CANoe version ', 
            ver.major, '.', 
            ver.minor, '.', 
            ver.Build, '...')
        self.App = app
        self.Measurement = app.Measurement  
        self.Running = lambda : self.Measurement.Running
        self.WaitForStart = lambda: DoEventsUntil(lambda: CanoeSync.Started)
        self.WaitForStop = lambda: DoEventsUntil(lambda: CanoeSync.Stopped)
        WithEvents(self.App.Measurement, CanoeMeasurementEvents)

    def Load(self, cfgPath):
        # current dir must point to the script file
        cfg = os.path.join(os.curdir, cfgPath)
        cfg = os.path.abspath(cfg)
        print('Opening: ', cfg)
        self.ConfigPath = os.path.dirname(cfg)
        self.Configuration = self.App.Configuration
        self.App.Open(cfg)

    def Start(self): 
        if not self.Running():
            self.Measurement.Start()
            self.WaitForStart()

    def Stop(self):
        if self.Running():
            self.Measurement.Stop()
            self.WaitForStop()
       
class CanoeMeasurementEvents(object):
    """Handler for CANoe measurement events"""
    def OnStart(self): 
        CanoeSync.Started = True
        CanoeSync.Stopped = False
        print("< measurement started >")
    def OnStop(self) : 
        CanoeSync.Started = False
        CanoeSync.Stopped = True
        print("< measurement stopped >")

# -----------------------------------------------------------------------------
# main
# -----------------------------------------------------------------------------
app = CanoeSync()

# loads the sample configuration
app.Load('CANoeConfig\PythonBasicEmpty.cfg')

# start the measurement
app.Start()    

# wait for a keypress to end the program
print("Press any key to exit ...")
while not msvcrt.kbhit():
    DoEvents()

# stops the measurement
app.Stop()