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Home < Documentation < Labs < PythonObserverCallbacks

Currently the syntax for defining observer callback functions with CallData argument is too comples, see Documentation/Nightly/Developers/FAQ/Python_Scripting#How_can_I_access_callData_argument_in_a_VTK_object_observer_callback_function

The remaining limitation is that mix-ins can only be used in helper classes (such as here) but not in scripted loadable module classes.

We need to fix: