3.7.3.4 SoDragger

void SoDraggerCB( void *data, SoDragger *dragger)

A Python implementation must look like:

def mySoDraggerCallback(myCallbackData, myDragger):
    '''Callback for ..

    myCallbackData can be any type or class
    myDragger is an iv.SoDragger
    '''

    # your Python code

    # no use to return something