U
    (dJ                     @   sn   d dl Z d dlmZmZmZmZmZ d dlZd dlm	  m
Z
 ddl	mZ G dd de
jZG dd dZdS )	    N)AnyCallableListOptionalTuple   )_log_api_usage_oncec                   @   s   e Zd ZdZdZdeee ee ee ddddZe	e
ddd	Ze	d
ddZed
ddZeeee dddZed
ddZdS )VisionDataseta   
    Base Class For making datasets which are compatible with torchvision.
    It is necessary to override the ``__getitem__`` and ``__len__`` method.

    Args:
        root (string): Root directory of dataset.
        transforms (callable, optional): A function/transforms that takes in
            an image and a label and returns the transformed versions of both.
        transform (callable, optional): A function/transform that  takes in an PIL image
            and returns a transformed version. E.g, ``transforms.RandomCrop``
        target_transform (callable, optional): A function/transform that takes in the
            target and transforms it.

    .. note::

        :attr:`transforms` and the combination of :attr:`transform` and :attr:`target_transform` are mutually exclusive.
       N)root
transforms	transformtarget_transformreturnc                 C   st   t |  t|tjjr"tj|}|| _|d k	}|d k	p>|d k	}|rP|rPt	d|| _
|| _|rjt||}|| _d S )NzGOnly transforms or transform/target_transform can be passed as argument)r   
isinstancetorchZ_sixZstring_classesospath
expanduserr   
ValueErrorr   r   StandardTransformr   )selfr   r   r   r   Zhas_transformsZhas_separate_transform r   ?/tmp/pip-unpacked-wheel-vx7f76es/torchvision/datasets/vision.py__init__   s    
zVisionDataset.__init__)indexr   c                 C   s   t dS )z
        Args:
            index (int): Index

        Returns:
            (Any): Sample and meta data, optionally transformed by the respective transforms.
        NNotImplementedError)r   r   r   r   r   __getitem__8   s    zVisionDataset.__getitem__r   c                 C   s   t d S Nr   r   r   r   r   __len__B   s    zVisionDataset.__len__c                    s   d j j }d   g} jd k	r8|d j  |   7 }t drl jd k	rl|t	 jg7 }|g fdd|D  }d
|S )NzDataset zNumber of datapoints: zRoot location: r   c                    s   g | ]}d  j  | qS ) )_repr_indent.0liner!   r   r   
<listcomp>M   s     z*VisionDataset.__repr__.<locals>.<listcomp>
)	__class____name__r"   r   append
extra_repr
splitlineshasattrr   reprjoin)r   headbodylinesr   r!   r   __repr__E   s    
zVisionDataset.__repr__r   r2   r   c                    s8   |   }  |d  g fdd|dd  D  S )Nr   c                    s    g | ]}d  dt  |qS z{}{}r#   formatlenr%   r2   r   r   r(   R   s     z8VisionDataset._format_transform_repr.<locals>.<listcomp>   r5   r.   r   r   r2   r4   r   r;   r   _format_transform_reprP   s    z$VisionDataset._format_transform_reprc                 C   s   dS )N r   r!   r   r   r   r-   T   s    zVisionDataset.extra_repr)NNN)r+   
__module____qualname____doc__r$   strr   r   r   intr   r   r"   r5   r   r?   r-   r   r   r   r   r	   
   s"      
r	   c                   @   sf   e Zd Zdee ee ddddZeeeeef dddZee	e
e	 dd	d
Ze	dddZdS )r   N)r   r   r   c                 C   s   || _ || _d S r    r   r   )r   r   r   r   r   r   r   Y   s    zStandardTransform.__init__)inputtargetr   c                 C   s0   | j d k	r|  |}| jd k	r(| |}||fS r    rF   )r   rG   rH   r   r   r   __call__]   s
    



zStandardTransform.__call__r6   c                    s8   |   }  |d  g fdd|dd  D  S )Nr   c                    s    g | ]}d  dt  |qS r7   r8   r%   r;   r   r   r(   f   s     z<StandardTransform._format_transform_repr.<locals>.<listcomp>r<   r=   r>   r   r;   r   r?   d   s    z(StandardTransform._format_transform_reprr   c                 C   sL   | j jg}| jd k	r&|| | jd7 }| jd k	rB|| | jd7 }d|S )NzTransform: zTarget transform: r)   )r*   r+   r   r?   r   r1   )r   r3   r   r   r   r5   h   s    


zStandardTransform.__repr__)NN)r+   rA   rB   r   r   r   r   r   rI   rD   r   r?   r5   r   r   r   r   r   X   s   r   )r   typingr   r   r   r   r   r   Ztorch.utils.datautilsdatar   ZDatasetr	   r   r   r   r   r   <module>   s   N