def RegisterLateBindingCallback(target_name, callback, **kwargs):
 _LATE_BINDING_STORE.setdefault(target_name, []).append((callback, kwargs))

def RegisterLateBindingCallback ( target_name , callback , ** kwargs ) : _LATE_BINDING_STORE . setdefault ( target_name , [ ] ) . append ( ( callback , kwargs ) )
registers a callback to be invoked when the rdfvalue named is declared .