[python-win32] Dynamic dispatching and AttributeErrors,

[Mark Hammond]

On 16/11/2010 5:14 AM, Brian Merrell wrote:
> I am using Windows 7, 32-bit python 2.6, 2.7 and the latest win32 release.
>
>     * makepy seems to work, I find what appears to be the one and only
>       appropriate library and it places an early binding skeleton file
>       in the expected gen_py directory.  Anticipated classes and methods
>       are observed.
>     * Whenever I call win32com.client.Dispatch on the "common name" (as
>       derived from the skeleton file) it seems to return the dynamic
>       dispatched version (even after using the EnsureModule method)

The above can happen for some objects which don't correctly report their 
type information at runtime - in which case you can often trick things 
using code similar to:

mod = win32com.gencache.EnsureModule(...)
ob = win32com.client.Dispatch(...)
# convert from dynamic to makepy supported.
ob = mod.GeneratedClassName(ob)


>     * When I try calling a known method on the returned COM object I get
>       an AttributeError
>     * I've also tried using every CLSID I can find in my skeleton file c
>       = Dispatch(CLSID) which results in either a "Class not registered"
>       or an object that also gives an AttributeError for a known method.

A traceback would be useful here - if the object really is a dynamic 
object, an AttributeError implies that the object itself also doesn't 
think the attribute exists (as dynamic objects ask the object for the 
attribute before raising an AttributeError).

HTH,

Mark