Updating keynote via Revit API

Is there any way to update keynote via Revit API ?.Can anyone explain why the python code is giving a warning saying Parameter is ready only when we are able to do the same using dynamo nodes?

what does the warning say? can u cap the screen?

Got the issue.There is a curtain panel family type whose keynote is read only in the list.Implemented try and catch now its working.
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