o
V h< @ sh d dl Zd dlmZ d dlmZmZmZ d dlZ d dl
Z
d dl m Z m
Z
d dlmZ G dd deZdS ) N)Path)CallableOptionalUnion) download_urlverify_str_arg)
VisionDatasetc
s e Zd ZdZdZ ddeeef dee de d e
d
ee d df fd d
Z de d e
jfddZd e fddZd e
fddZdddZ ZS ) 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.
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.
transform (callable, optional): A function/transform that takes in a torch Tensor
and returns a transformed version. E.g, ``transforms.RandomCrop``
zGhttp://www.cs.toronto.edu/~nitish/unsupervised_video/mnist_test_seq.npyN
Frootsplit split_ratiodownload transformreturnc s" t j||d tj| j| jj| _| j
dd | _ |d ur&t |dd || _
t
|ts7tdt| d| krAdksJn td | d
|| _|rS| | s[td tttj| j| j }| j
d krw|d | j }n | j
d
kr|| jd }|ddd | _ d S )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 s