def renamenx(self, key):

        raise mredis.exceptions.UnextendedRedisCommand
We are called when a new image is set in the channel.
dataset/ETHPy150Open gmr/mredis/mredis/client.py/MRedis.renamenx--crossover with--dataset/ETHPy150Open ejeschke/ginga/ginga/misc/plugins/MultiDim.py/MultiDim.new_image_cb