def _ex_connection_class_kwargs(self):

        kwargs = super(DimensionDataNodeDriver,
                       self)._ex_connection_class_kwargs()
        kwargs['region'] = self.selected_region
        return kwargs
Add the region to the kwargs before the connection is instantiated
dataset/ETHPy150Open apache/libcloud/libcloud/compute/drivers/dimensiondata.py/DimensionDataNodeDriver._ex_connection_class_kwargs