o
    Vh                     @   sp   d dl Z d dlmZ d dlmZmZmZmZmZ d dl	Z
d dlmZ ddlmZ ddlmZ G dd	 d	eZdS )
    N)Path)AnyCallableOptionalTupleUnion)Image   )download_url)VisionDatasetc                       s   e Zd ZdZg dg ddZ				ddeeef d	ed
e	e
 de	e
 deddf fddZdedeeef fddZdefddZ  ZS )USPSa&  `USPS <https://www.csie.ntu.edu.tw/~cjlin/libsvmtools/datasets/multiclass.html#usps>`_ Dataset.
    The data-format is : [label [index:value ]*256 \n] * num_lines, where ``label`` lies in ``[1, 10]``.
    The value for each pixel lies in ``[-1, 1]``. Here we transform the ``label`` into ``[0, 9]``
    and make pixel values in ``[0, 255]``.

    Args:
        root (str or ``pathlib.Path``): Root directory of dataset to store``USPS`` data files.
        train (bool, optional): If True, creates dataset from ``usps.bz2``,
            otherwise from ``usps.t.bz2``.
        transform (callable, optional): A function/transform that takes in a 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.
        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.

    )zKhttps://www.csie.ntu.edu.tw/~cjlin/libsvmtools/datasets/multiclass/usps.bz2zusps.bz2 ec16c51db3855ca6c91edd34d0e9b197)zMhttps://www.csie.ntu.edu.tw/~cjlin/libsvmtools/datasets/multiclass/usps.t.bz2z
usps.t.bz2 8ea070ee2aca1ac39742fdd1ef5ed118)traintestTNFrootr   	transformtarget_transformdownloadreturnc                    s   t  j|||d |rdnd}| j| \}}}	tj| j|}
|r0tj|
s0t|| j||	d dd l	}|
|
7}dd | D }dd |D }tj|tjd	d
}|d d d jtjd	}dd |D }W d    n1 ssw   Y  || _|| _d S )N)r   r   r   r   )md5r   c                 S   s   g | ]}|   qS  )decodesplit).0liner   r   M/var/www/vscode/kcb/lib/python3.10/site-packages/torchvision/datasets/usps.py
<listcomp>@   s    z!USPS.__init__.<locals>.<listcomp>c                 S   s"   g | ]}d d |dd D qS )c                 S   s   g | ]	}| d d qS ):)r   )r   xr   r   r   r   A   s    z,USPS.__init__.<locals>.<listcomp>.<listcomp>r	   Nr   )r   datar   r   r   r   A   s   " )dtype)r      r#   r	         c                 S   s   g | ]
}t |d  d qS )r   r	   )int)r   dr   r   r   r   D   s    )super__init__
split_listospathjoinr   existsr
   bz2open	readlinesnpasarrayfloat32reshapeastypeuint8r!   targets)selfr   r   r   r   r   r   urlfilenamechecksum	full_pathr/   fpraw_datatmp_listimgsr8   	__class__r   r   r)   -   s    
zUSPS.__init__indexc                 C   sX   | j | t| j| }}tj|dd}| jdur| |}| jdur(| |}||fS )z
        Args:
            index (int): Index

        Returns:
            tuple: (image, target) where target is index of the target class.
        L)modeN)r!   r&   r8   r   	fromarrayr   r   )r9   rD   imgtargetr   r   r   __getitem__I   s   



zUSPS.__getitem__c                 C   s
   t | jS )N)lenr!   )r9   r   r   r   __len___   s   
zUSPS.__len__)TNNF)__name__
__module____qualname____doc__r*   r   strr   boolr   r   r)   r&   r   r   rJ   rL   __classcell__r   r   rB   r   r      s0    
r   )r+   pathlibr   typingr   r   r   r   r   numpyr2   PILr   utilsr
   visionr   r   r   r   r   r   <module>   s    