o
    پi                     @   s   d Z ddlZddlmZmZmZmZmZmZ ddl	m
Z
 ddlmZ ddlmZ ddlmZ 						dd
edeeeeef  dee dedef
ddZG dd deZdS )z A dataset reader that extracts images from folders

Folders are scanned recursively to find image files. Labels are based
on the folder hierarchy, just leaf folders by default.

Hacked together by / Copyright 2020 Ross Wightman
    N)DictListOptionalSetTupleUnionnatural_key   )load_class_map)get_img_extensions)ReaderTfoldertypesclass_to_idxleaf_name_onlysortc                    s  |st ddnt|}g }g }tj| dddD ]D\}}}	|| kr'tj|| nd}
|r1tj|
n|
tjjd}|	D ]}tj	|\}}|
 |v rZ|tj|| || q;q du rut|}tt|td}d	d
 t|D   fddt||D }|rt|dd d}| fS )a   Walk folder recursively to discover images and map them to classes by folder names.

    Args:
        folder: root of folder to recursively search
        types: types (file extensions) to search for in path
        class_to_idx: specify mapping for class (folder name) to class index if set
        leaf_name_only: use only leaf-name of folder walk for class names
        sort: re-sort found images by name (for consistent ordering)

    Returns:
        A list of image and target tuples, class_to_idx mapping
    T)as_setF)topdownfollowlinks _N)keyc                 S   s   i | ]\}}||qS  r   ).0idxcr   r   Y/home/ubuntu/.local/lib/python3.10/site-packages/timm/data/readers/reader_image_folder.py
<dictcomp>4   s    z+find_images_and_targets.<locals>.<dictcomp>c                    s$   g | ]\}}| v r| | fqS r   r   )r   flr   r   r   
<listcomp>5   s   $ z+find_images_and_targets.<locals>.<listcomp>c                 S   s   t | d S Nr   r   )kr   r   r   <lambda>7   s    z)find_images_and_targets.<locals>.<lambda>)r   setoswalkpathrelpathbasenamereplacesepsplitextlowerappendjoinlistsortedr	   	enumeratezip)r   r   r   r   r   labels	filenamesrootsubdirsfilesrel_pathlabelr   baseextunique_labelssorted_labelsimages_and_targetsr   r!   r   find_images_and_targets   s*    
rB   c                       s<   e Zd Z		d fdd	Zdd Zdd Zdd
dZ  ZS )ReaderImageFolderr   Nc                    sx   t    || _d }|rt||}d }|r|d}t|||d\| _| _t| jdkr:t	d| dd
t  d S )N;)r   r   r   z Found 0 images in subfolders of z!. Supported image extensions are z, )super__init__r8   r   splitrB   samplesr   lenRuntimeErrorr1   r   )selfr8   	class_map	input_keyr   
find_types	__class__r   r   rF   =   s(   



zReaderImageFolder.__init__c                 C   s   | j | \}}t|d|fS )Nrb)rH   open)rK   indexr)   targetr   r   r   __getitem__V   s   zReaderImageFolder.__getitem__c                 C   s
   t | jS )N)rI   rH   )rK   r   r   r   __len__Z   s   
zReaderImageFolder.__len__Fc                 C   s:   | j | d }|rtj|}|S |stj|| j}|S r#   )rH   r'   r)   r+   r*   r8   )rK   rS   r+   absolutefilenamer   r   r   	_filename]   s   zReaderImageFolder._filename)r   N)FF)__name__
__module____qualname__rF   rU   rV   rY   __classcell__r   r   rO   r   rC   ;   s    rC   )NNTT)__doc__r'   typingr   r   r   r   r   r   timm.utils.miscr	   rL   r   img_extensionsr   readerr   strboolrB   rC   r   r   r   r   <module>   s.     
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