3.7.3.5 SoEventCallback

void SoEventCallbackCB( void *data, SoEventCallback *node)

A Python implementation must look like:

def mySoEventCallbackCallback(myCallbackData, mySoEventCallback):
    '''Callback for ..

    myCallbackData can be any type or class
    mySoEventCalllback is an iv.SoEventCallback
    '''

    # your Python code

    # no use to return something