U
    h!                     @   s^  d dl Z d dlZd dlZd dlmZ d dlmZ d dlmZm	Z	m
Z
mZmZmZmZ d dlZddlmZ ddlmZmZmZ dd	d
dZdZG dd deZdeeef ee ee	eef ee f dddZeeef eeddddZd eeef ee ddddZd!eeef ee eddddZd"eeef ee eee  eddddZdS )#    N)contextmanager)Path)AnyDictIteratorListOptionalTupleUnion   )ImageFolder)check_integrityextract_archiveverify_str_arg)zILSVRC2012_img_train.tarZ 1d675b47d978889d74fa0da5fadfb00e)zILSVRC2012_img_val.tarZ 29b22e2961454d5413ddabcf34fc5622)zILSVRC2012_devkit_t12.tar.gzZ fa75699e90414af021442c21a62c3abf)trainvaldevkitzmeta.binc                       sd   e Zd ZdZdeeef eedd fddZdddd	Z	e
edd
dZedddZ  ZS )ImageNeta]  `ImageNet <http://image-net.org/>`_ 2012 Classification Dataset.

    .. note::
        Before using this class, it is required to download ImageNet 2012 dataset from
        `here <https://image-net.org/challenges/LSVRC/2012/2012-downloads.php>`_ and
        place the files ``ILSVRC2012_devkit_t12.tar.gz`` and ``ILSVRC2012_img_train.tar``
        or ``ILSVRC2012_img_val.tar`` based on ``split`` in the root directory.

    Args:
        root (str or ``pathlib.Path``): Root directory of the ImageNet Dataset.
        split (string, optional): The dataset split, supports ``train``, or ``val``.
        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.
        loader (callable, optional): A function to load an image given its path.

     Attributes:
        classes (list): List of the class name tuples.
        class_to_idx (dict): Dict with items (class_name, class_index).
        wnids (list): List of the WordNet IDs.
        wnid_to_idx (dict): Dict with items (wordnet_id, class_index).
        imgs (list): List of (image path, class_index) tuples
        targets (list): The class_index value for each image in the dataset
    r   N)rootsplitkwargsreturnc                    s   t j| }| _t|dd| _|   t| jd  t j	| j
f| || _| j| _| j| _ fdd| jD | _dd t| jD | _d S )Nr   )r   r   r   c                    s   g | ]} | qS  r   ).0wnidwnid_to_classesr   O/var/www/html/venv/lib/python3.8/site-packages/torchvision/datasets/imagenet.py
<listcomp>=   s     z%ImageNet.__init__.<locals>.<listcomp>c                 S   s    i | ]\}}|D ]
}||qqS r   r   )r   idxclssclsr   r   r   
<dictcomp>>   s
        z%ImageNet.__init__.<locals>.<dictcomp>)ospath
expanduserr   r   r   parse_archivesload_meta_filesuper__init__split_folderclasseswnidsZclass_to_idxZwnid_to_idx	enumerate)selfr   r   r   	__class__r   r   r)   1   s    zImageNet.__init__r   c                 C   sZ   t tj| jtst| j tj| jsV| j	dkrBt
| j n| j	dkrVt| j d S )Nr   r   )r   r#   r$   joinr   	META_FILEparse_devkit_archiveisdirr*   r   parse_train_archiveparse_val_archiver.   r   r   r   r&   @   s    


zImageNet.parse_archivesc                 C   s   t j| j| jS N)r#   r$   r2   r   r   r8   r   r   r   r*   J   s    zImageNet.split_folderc                 C   s   dj f | jS )NzSplit: {split})format__dict__r8   r   r   r   
extra_reprN   s    zImageNet.extra_repr)r   )__name__
__module____qualname____doc__r
   strr   r   r)   r&   propertyr*   r<   __classcell__r   r   r/   r   r      s   "
r   )r   filer   c                 C   sH   |d krt }tj| |}t|r0tj|ddS d}t||| d S )NT)Zweights_onlyzThe meta file {} is not present in the root directory or is corrupted. This file is automatically created by the ImageNet dataset.)	r3   r#   r$   r2   r   torchloadRuntimeErrorr:   )r   rD   msgr   r   r   r'   R   s    r'   )r   rD   md5r   c                 C   s,   t tj| ||s(d}t||| d S )Nz{The archive {} is not present in the root directory or is corrupted. You need to download it externally and place it in {}.)r   r#   r$   r2   rG   r:   )r   rD   rI   rH   r   r   r   _verify_archivea   s    rJ   c              	      s  ddl m tttttf ttttdf f f dfdd}ttt ddd}ttt d	d
d}t	d }|dkr|d }|d }t
| || | h}ttj| || tj|d}||\ }	||}
 fdd|
D }t|	|ftj| t W 5 Q R X dS )aI  Parse the devkit archive of the ImageNet2012 classification dataset and save
    the meta information in a binary file.

    Args:
        root (str or ``pathlib.Path``): Root directory containing the devkit archive
        file (str, optional): Name of devkit archive. Defaults to
            'ILSVRC2012_devkit_t12.tar.gz'
    r   N.)devkit_rootr   c                    s   t j| dd}j|ddd  tt  d } fddt|D  tt  d d	 \}}}d
d |D }dd t||D }dd t||D }||fS )Ndatazmeta.matT)Z
squeeze_meZsynsets   c                    s    g | ]\}}|d kr | qS )r   r   )r   r   Znum_childrenmetar   r   r   y   s      z@parse_devkit_archive.<locals>.parse_meta_mat.<locals>.<listcomp>   c                 S   s   g | ]}t |d qS )z, )tupler   )r   r    r   r   r   r   {   s     c                 S   s   i | ]\}}||qS r   r   )r   r   r   r   r   r   r"   |   s      z@parse_devkit_archive.<locals>.parse_meta_mat.<locals>.<dictcomp>c                 S   s   i | ]\}}||qS r   r   )r   r   r    r   r   r   r"   }   s      )r#   r$   r2   Zloadmatlistzipr-   )rK   ZmetafileZnums_childrenZidcsr,   r+   idx_to_wnidr   )siorN   r   parse_meta_matu   s    z,parse_devkit_archive.<locals>.parse_meta_matc              	   S   s:   t j| dd}t|}| }W 5 Q R X dd |D S )NrL   z&ILSVRC2012_validation_ground_truth.txtc                 S   s   g | ]}t |qS r   )int)r   Zval_idxr   r   r   r      s     zKparse_devkit_archive.<locals>.parse_val_groundtruth_txt.<locals>.<listcomp>)r#   r$   r2   open	readlines)rK   rD   Ztxtfhval_idcsr   r   r   parse_val_groundtruth_txt   s    
z7parse_devkit_archive.<locals>.parse_val_groundtruth_txtr1   c               	   s   s$   t  } z
| V  W 5 t|  X d S r9   )tempfilemkdtempshutilrmtree)tmp_dirr   r   r   get_tmp_dir   s    
z)parse_devkit_archive.<locals>.get_tmp_dirr   r   ZILSVRC2012_devkit_t12c                    s   g | ]} | qS r   r   )r   r   )rT   r   r   r      s     z(parse_devkit_archive.<locals>.<listcomp>)Zscipy.ioiorA   r	   r   rW   r   r   r   ARCHIVE_METArJ   r   r#   r$   r2   rE   saver3   )r   rD   rV   r[   ra   archive_metarI   r`   rK   r   rZ   Z	val_wnidsr   )rT   rU   r   r4   j   s"    	4r4   r   )r   rD   folderr   c                    s   t d }|dkr|d }|d }t| || tj| | ttj| |   fddt D }|D ]}t|tj|d dd qjdS )	a  Parse the train images archive of the ImageNet2012 classification dataset and
    prepare it for usage with the ImageNet dataset.

    Args:
        root (str or ``pathlib.Path``): Root directory containing the train images archive
        file (str, optional): Name of train images archive. Defaults to
            'ILSVRC2012_img_train.tar'
        folder (str, optional): Optional name for train images folder. Defaults to
            'train'
    r   Nr   r   c                    s   g | ]}t j |qS r   r#   r$   r2   )r   archiveZ
train_rootr   r   r      s     z'parse_train_archive.<locals>.<listcomp>T)Zremove_finished)rc   rJ   r#   r$   r2   r   listdirsplitext)r   rD   rf   re   rI   Zarchivesrh   r   ri   r   r6      s    r6   r   )r   rD   r,   rf   r   c           	         s   t d }|dkr|d }|d }|dkr4t| d }t| || tj| | ttj| |  t fddt D }t	|D ]}t
tj | qt||D ](\}}t|tj |tj| qdS )az  Parse the validation images archive of the ImageNet2012 classification dataset
    and prepare it for usage with the ImageNet dataset.

    Args:
        root (str or ``pathlib.Path``): Root directory containing the validation images archive
        file (str, optional): Name of validation images archive. Defaults to
            'ILSVRC2012_img_val.tar'
        wnids (list, optional): List of WordNet IDs of the validation images. If None
            is given, the IDs are loaded from the meta file in the root directory
        folder (str, optional): Optional name for validation images folder. Defaults to
            'val'
    r   Nr   r   c                 3   s   | ]}t j |V  qd S r9   rg   )r   imageZval_rootr   r   	<genexpr>   s     z$parse_val_archive.<locals>.<genexpr>)rc   r'   rJ   r#   r$   r2   r   sortedrj   setmkdirrS   r^   movebasename)	r   rD   r,   rf   re   rI   Zimagesr   Zimg_filer   rm   r   r7      s    r7   )N)N)Nr   )NNr   )r#   r^   r\   
contextlibr   pathlibr   typingr   r   r   r   r   r	   r
   rE   rf   r   utilsr   r   r   rc   r3   r   rA   r'   rJ   r4   r6   r7   r   r   r   r   <module>   s8   $<4	 6"     
  
 