[vtkusers] vtkInformationKey in Python

[Maxwell, Thomas P. (GSFC-606.2)[SCIENCE APPLICATIONS INTL CORP]]

How does one create a user-defined vtkInformationKey (subclass) in python?
The methods used in C++ don't seem to work in python.

( I would like to pass ImageData metadata down the pipeline in a python app.  I'm attempting to add custom fields to the port information objects.  Is there is a better way to pass the metadata? )

Thanks,
Tom
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