COM server being passed an instance of an interface

[Roger Upole]

You ought to be able to do
 win32com.client.Dispatch(WL)
to get a usable com object.
    hth
        Roger

"Phil" <pruggera at san.rr.com> wrote in message
news:rXsrc.542$wO4.145 at twister.socal.rr.com...
> I am using a Pascal like language (Wealth-Lab) on W2K and call this
server:
>
> class HelloWorld:
>     _reg_clsid_ = "{4E797C6A-5969-402F-8101-9C95453CF8F6}"
>     _reg_desc_ = "Python Test COM Server"
>     _reg_progid_ = "Python.TestServer"
>     _public_methods_ = ['Hello']
>     _public_attrs_ = ['softspace', 'noCalls']
>     _readonly_attrs_ = ['noCalls']
>
>     def __init__(self):
>         self.softspace = 1
>         self.noCalls = 0
>
>     def Hello(self, WL ):  # WL is an instance of a interface class that
> exists in the client
> #       In VB this would look like Public Sub Hello(ByVal objWL As
> WealthLab.IWealthLabAddOn3)
>         self.noCalls = self.noCalls + 1
>         # insert "softspace" number of spaces
>         return "Hello" + " " * self.softspace + str(self.noCalls) +
> str(WL.BarCount())
>
> if __name__=='__main__':
>     import win32com.server.register
>     win32com.server.register.UseCommandLine(HelloWorld)
>
> How do I get the instance of the interface to have its methods?  The
Python
> Trace Collector gives me:
>
> Object with win32trace dispatcher created (object=None)
> in _GetIDsOfNames_ with '('Hello',)' and '2048'
>
> in _Invoke_ with 1002 0 3 (<PyIDispatch at 0x3c5efc4 with obj at
0x331ea00>)
> Traceback (most recent call last):
>   File "C:\Python23\Lib\site-packages\win32com\server\dispatcher.py", line
> 40, in _Invoke_
>     return self.policy._Invoke_(dispid, lcid, wFlags, args)
>   File "C:\Python23\Lib\site-packages\win32com\server\policy.py", line
283,
> in _Invoke_
>     return self._invoke_(dispid, lcid, wFlags, args)
>   File "C:\Python23\Lib\site-packages\win32com\server\policy.py", line
288,
> in _invoke_
>     return S_OK, -1, self._invokeex_(dispid, lcid, wFlags, args, None,
None)
>   File "C:\Python23\Lib\site-packages\win32com\server\policy.py", line
550,
> in _invokeex_
>     return func(*args)
>   File "G:\Python\Dev\COM Server - win.py", line 27, in Hello
>     return "Hello" + " " * self.softspace + str(self.noCalls) +
> str(WL.BarCount())
> AttributeError: 'PyIDispatch' object has no attribute 'BarCount'
> pythoncom error: Python error invoking COM method.
> Traceback (most recent call last):
>   File "C:\Python23\Lib\site-packages\win32com\server\dispatcher.py", line
> 129, in _Invoke_
>     return DispatcherBase._Invoke_(self, dispid, lcid, wFlags, args)
>   File "C:\Python23\Lib\site-packages\win32com\server\dispatcher.py", line
> 42, in _Invoke_
>     self._HandleException_()
>   File "C:\Python23\Lib\site-packages\win32com\server\dispatcher.py", line
> 107, in _HandleException_
>     reraise()
>   File "C:\Python23\Lib\site-packages\win32com\server\dispatcher.py", line
> 40, in _Invoke_
>     return self.policy._Invoke_(dispid, lcid, wFlags, args)
>   File "C:\Python23\Lib\site-packages\win32com\server\policy.py", line
283,
> in _Invoke_
>     return self._invoke_(dispid, lcid, wFlags, args)
>   File "C:\Python23\Lib\site-packages\win32com\server\policy.py", line
288,
> in _invoke_
>     return S_OK, -1, self._invokeex_(dispid, lcid, wFlags, args, None,
None)
>   File "C:\Python23\Lib\site-packages\win32com\server\policy.py", line
550,
> in _invokeex_
>     return func(*args)
>   File "G:\Python\Dev\COM Server - win.py", line 27, in Hello
>     return "Hello" + " " * self.softspace + str(self.noCalls) +
> str(WL.BarCount())
> exceptions.AttributeError: 'PyIDispatch' object has no attribute
'BarCount'
> in _Invoke_ with 0 1024 2 ()
> in _Invoke_ with 0 1024 2 ()
>
>