>> The com object, I am dispatching, is provided by Rhinoceros CAD package. The
>> evaluation version of Rhinoceros can be obtained from here -
>> http://download.rhino3d.com/rhino/4.0/evaluation/download/
>> . The evaluation is quite liberal, since you can use it as much as you like,
>> but you are restricted to 15 saves only.
>>
>> I am using this object to control VB functions provided by Rhino scripting
>> interface.
>>
>> You can reproduce the problem by:
>>
>> 1. R = CreateObject("Rhino4.Application")
>> 2. RS = R.GetScriptObject
>> 3. RS.AddPoint([10.0,10.0,10.0])
>>
>> At this point I should obtain all functions provided by RhinoScript type
>> library as methods, but all I get are attributes e.g.
>>
>>>>> RS.AddPoint([10.0,10.0,10.0])
>> Traceback (most recent call last):
>> File "<stdin>", line 1, in ?
>> TypeError: 'NoneType' object is not callable
>>
>> , where RS.AddPoint() is the function I am calling.
>>
>> I presume that all functions in R.GetScriptObject are flagged as attributes
>> instead of methods, note that R.visible =True works. In PyWin32 I used to
>> flag each attribute as methods with _FlagAsMethod(attribute name) function.
>>
>> I hope I was able to describe the problem as much as I can.
>
> Very clear description, and very helpful - thanks.
>
> This simple patch should do the trick (the docstring is stolen from win32com):
The patch is now in the repository.
>
> <snip>
> Index: comtypes/client/dynamic.py
> ===================================================================
> --- comtypes/client/dynamic.py (revision 572)
> +++ comtypes/client/dynamic.py (working copy)
> @@ -58,6 +58,7 @@
> def __init__(self, comobj):
> self.__dict__["_comobj"] = comobj
> self.__dict__["_ids"] = {} # Tiny optimization: trying not to use
> GetIDsOfNames more than once
> + self.__dict__["_methods"] = set()
>
> def __enum(self):
> e = self._comobj.Invoke(-4) # DISPID_NEWENUM
> @@ -85,7 +86,23 @@
> "QueryInterface is forwarded to the real com object."
> return self._comobj.QueryInterface(*args)
>
> + def _FlagAsMethod(self, *names):
> + """Flag these attribute names as being methods.
> + Some objects do not correctly differentiate methods and
> + properties, leading to problems when calling these methods.
> +
> + Specifically, trying to say: ob.SomeFunc()
> + may yield an exception "None object is not callable"
> + In this case, an attempt to fetch the *property*has worked
> + and returned None, rather than indicating it is really a method.
> + Calling: ob._FlagAsMethod("SomeFunc")
> + should then allow this to work.
> + """
> + self._methods.update(names)
> +
> def __getattr__(self, name):
> + if name.startswith("__") and name.endswith("__"):
> + raise AttributeError(name)
> ## tc =
> self._comobj.GetTypeInfo(0).QueryInterface(comtypes.typeinfo.ITypeComp)
> ## dispid = tc.Bind(name)[1].memid
> dispid = self._ids.get(name)
> @@ -93,6 +110,11 @@
> dispid = self._comobj.GetIDsOfNames(name)[0]
> self._ids[name] = dispid
>
> + if name in self._methods:
> + result = MethodCaller(dispid, self)
> + self.__dict__[name] = result
> + return result
> +
> flags = comtypes.automation.DISPATCH_PROPERTYGET
> try:
> result = self._comobj.Invoke(dispid, _invkind=flags)
> </snip>
>
> If it works for you I can commit it to the repository.
>
--
Thanks,
Thomas
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