ڧg<vddlZddlmZddlmZmZmZddlZ ddl Z ddl m Z m Z ddlmZGddeZdS)N)Path)CallableOptionalUnion) download_urlverify_str_arg) VisionDatasetc eZdZdZdZ ddeeefdeede d e d ee d df fd Z d e d e jfdZd e fdZd e fdZddZxZS) MovingMNISTaE`MovingMNIST `_ Dataset. Args: root (str or ``pathlib.Path``): Root directory of dataset where ``MovingMNIST/mnist_test_seq.npy`` exists. split (string, optional): The dataset split, supports ``None`` (default), ``"train"`` and ``"test"``. If ``split=None``, the full data is returned. split_ratio (int, optional): The split ratio of number of frames. If ``split="train"``, the first split frames ``data[:, :split_ratio]`` is returned. If ``split="test"``, the last split frames ``data[:, split_ratio:]`` is returned. If ``split=None``, this parameter is ignored and the all frames data is returned. transform (callable, optional): A function/transform that takes in a torch Tensor and returns a transformed version. E.g, ``transforms.RandomCrop`` download (bool, optional): If true, downloads the dataset from the internet and puts it in root directory. If dataset is already downloaded, it is not downloaded again. zGhttp://www.cs.toronto.edu/~nitish/unsupervised_video/mnist_test_seq.npyN Frootsplit split_ratiodownload transformreturnct||tj|j|jj|_|j dd|_ |t|dd||_ t|tstdt!|d|cxkrdksnt#d |d ||_|r||st+d t-jt1jtj|j|j }|j d kr|d|j}n|j d kr||jd}|ddd|_dS)N)r/r)traintestz,`split_ratio` should be an integer, but got z:`split_ratio` should be `1 <= split_ratio <= 19`, but got z instead.z %>>$''D r6c*t|jSN)lenr3r4s r5__len__zMovingMNIST.__len__Os49~~r6ctjtj|j|jSr;)rrexistsrr"r$r=s r5r*zMovingMNIST._check_existsRs+w~~bgll4+r*r __classcell__)r s@r5r r s/ UD $(, "C"CCI"C}"C "C  "C H% "C "C"C"C"C"C"CH s u|    OtOOOO         r6r )os.pathrpathlibrtypingrrrnumpyr.r,torchvision.datasets.utilsrrtorchvision.datasets.visionr r r6r5rTs,,,,,,,,,, CCCCCCCC555555S S S S S -S S S S S r6