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    ¯Ê¹j0
  ã                
   @   s²   d Z ddlZddlZddlmZ ddlZddlmZ ddl	m
Z
 zddlZW n. ek
rz Z zedƒ e‚W 5 dZ[X Y nX ddlmZ ddlmZ dd
d„ZG dd„ deƒZdS )zd Dataset reader that wraps Hugging Face datasets

Hacked together by / Copyright 2022 Ross Wightman
é    N)ÚOptional)ÚImagezDPlease install Hugging Face datasets package `pip install datasets`.é   )Úload_class_map)ÚReaderÚlabelc                    s0   d| j kri S | j | ‰ ‡ fdd„ˆ jD ƒ}|S )Nr   c                    s   i | ]}|ˆ   |¡“qS © )Zstr2int)Ú.0Ún©Zclass_labelr   ú\/var/www/html/bwave/python/venv/lib/python3.8/site-packages/timm/data/readers/reader_hfds.pyÚ
<dictcomp>   s      z$get_class_labels.<locals>.<dictcomp>)ÚfeaturesÚnames)ÚinfoÚ	label_keyÚclass_to_idxr   r   r   Úget_class_labels   s
    

r   c                	       sN   e Zd Zdeee eeeeedœ‡ fdd„Zd	d
„ Zdd„ Z	ddd„Z
‡  ZS )Ú
ReaderHfdsNÚtrainÚimager   F)ÚnameÚrootÚsplitÚ	class_mapÚ	image_keyÚ
target_keyÚdownloadc                    sš   t ƒ  ¡  || _|| _tj||| jd�| _| j |tjdd�¡| _|| _	|| _
d| _|rjt|ƒ| _d| _nt| jj| j
ƒ| _| jjj| | _| jj| _dS )z	
        )r   Ú	cache_dirF)ÚdecodeTN)ÚsuperÚ__init__r   r   ÚdatasetsZload_datasetÚdatasetZcast_columnr   r   r   Úremap_classr   r   r   r   ZsplitsZ
split_infoZnum_examplesZnum_samples)Úselfr   r   r   r   r   r   r   ©Ú	__class__r   r   r!       s$    
ý
zReaderHfds.__init__c                 C   sx   | j | }|| j }d|kr4|d r4t |d ¡}n"d|krD|d sHt‚t|d dƒ}|| j }| jrp| j| }||fS )NÚbytesÚpathÚrb)	r#   r   ÚioÚBytesIOÚAssertionErrorÚopenr   r$   r   )r%   ÚindexÚitemr   r   r   r   r   Ú__getitem__B   s    



zReaderHfds.__getitem__c                 C   s
   t | jƒS )N)Úlenr#   )r%   r   r   r   Ú__len__O   s    zReaderHfds.__len__c                 C   s   | j | }|| j d S )Nr)   )r#   r   )r%   r/   ÚbasenameÚabsoluter0   r   r   r   Ú	_filenameR   s    
zReaderHfds._filename)Nr   Nr   r   F)FF)Ú__name__Ú
__module__Ú__qualname__Ústrr   ÚdictÚboolr!   r1   r3   r6   Ú__classcell__r   r   r&   r   r      s$         øø"r   )r   )Ú__doc__r+   ÚmathÚtypingr   ZtorchZtorch.distributedÚdistributedÚdistZPILr   r"   ÚImportErrorÚeÚprintr   r   Úreaderr   r   r   r   r   r   r   Ú<module>   s   
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