* add shape property and modify __getitem__ * change Batch.size to Batch.shape * setattr * Batch.empty * remove scalar in advanced slicing * modify empty_ and __getitem__ * missing testcase * fix empty
* add shape property and modify __getitem__ * change Batch.size to Batch.shape * setattr * Batch.empty * remove scalar in advanced slicing * modify empty_ and __getitem__ * missing testcase * fix empty