a
    d                     @   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eeeeeef  ee eed
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 ]\}}}	|| krNtj|| nd}
|rbtj|
n|
tjjd}|	D ]>}tj	|\}}|
 |v rv|tj|| || qvq. du rt|}tt|td}d	d
 t|D   fddt||D }|rt|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 recrusively 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)Zas_setF)topdownfollowlinks _N)keyc                 S   s   i | ]\}}||qS  r   ).0idxcr   r   n/var/www/html/stable-diffusion-webui/venv/lib/python3.9/site-packages/timm/data/readers/reader_image_folder.py
<dictcomp>4       z+find_images_and_targets.<locals>.<dictcomp>c                    s$   g | ]\}}| v r| | fqS r   r   )r   flr   r   r   
<listcomp>5   r   z+find_images_and_targets.<locals>.<listcomp>c                 S   s   t | d S Nr   r   )kr   r   r   <lambda>7   r   z)find_images_and_targets.<locals>.<lambda>)r   setoswalkpathrelpathbasenamereplacesepsplitextlowerappendjoinlistsortedr	   	enumeratezip)r   r   r   r   r   labels	filenamesrootsubdirsfilesrel_pathlabelr   baseextZunique_labelsZsorted_labelsZimages_and_targetsr   r!   r   find_images_and_targets   s&     r?   c                       s8   e Zd Zd fdd	Zdd Zdd Zdd	d
Z  ZS )ReaderImageFolderr   c                    sd   t    || _d }|r"t||}t||d\| _| _t| jdkr`td| dd	t
  d S )Nr!   r   z Found 0 images in subfolders of z!. Supported image extensions are z, )super__init__r8   r   r?   samplesr   lenRuntimeErrorr1   r   )selfr8   	class_mapr   	__class__r   r   rB   =   s    


zReaderImageFolder.__init__c                 C   s   | j | \}}t|d|fS )Nrb)rC   open)rF   indexr)   targetr   r   r   __getitem__M   s    zReaderImageFolder.__getitem__c                 C   s
   t | jS )N)rD   rC   )rF   r   r   r   __len__Q   s    zReaderImageFolder.__len__Fc                 C   s8   | j | d }|r tj|}n|s4tj|| j}|S r#   )rC   r'   r)   r+   r*   r8   )rF   rL   r+   absolutefilenamer   r   r   	_filenameT   s    zReaderImageFolder._filename)r   )FF)__name__
__module____qualname__rB   rN   rO   rR   __classcell__r   r   rH   r   r@   ;   s
    r@   )NNTT)__doc__r'   typingr   r   r   r   r   r   Ztimm.utils.miscr	   rG   r   Zimg_extensionsr   readerr   strboolr?   r@   r   r   r   r   <module>   s$        )