U
    ­Ê¹jû  ã                   @   sl   d dl mZ d dlmZmZmZmZmZ d dlm	Z	 ddl
mZmZmZmZ ddlmZ G dd„ deƒZd	S )
é    ©Újoin)ÚAnyÚCallableÚListÚOptionalÚTuple)ÚImageé   )Úcheck_integrityÚdownload_and_extract_archiveÚlist_dirÚ
list_files)ÚVisionDatasetc                       sœ   e Zd ZdZdZdZdddœZdeee	e
 e	e
 edd
œ‡ fdd„Zedœdd„Zeeeef dœdd„Zedœdd„Zddœdd„Zedœdd„Z‡  ZS )ÚOmniglotaq  `Omniglot <https://github.com/brendenlake/omniglot>`_ Dataset.

    Args:
        root (string): Root directory of dataset where directory
            ``omniglot-py`` exists.
        background (bool, optional): If True, creates dataset from the "background" set, otherwise
            creates from the "evaluation" set. This terminology is defined by the authors.
        transform (callable, optional): A function/transform that  takes in an 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 zip files from the internet and
            puts it in root directory. If the zip files are already downloaded, they are not
            downloaded again.
    zomniglot-pyzDhttps://raw.githubusercontent.com/brendenlake/omniglot/master/pythonZ 68d2efa1b9178cc56df9314c21c6e718Z 6b91aef0f799c5bb55b94e3f2daec811)Úimages_backgroundÚimages_evaluationTNF)ÚrootÚ
backgroundÚ	transformÚtarget_transformÚdownloadÚreturnc                    s¢   t ƒ jt|ˆ jƒ||d� |ˆ _|r,ˆ  ¡  ˆ  ¡ s<tdƒ‚tˆ jˆ  	¡ ƒˆ _
tˆ j
ƒˆ _t‡ fdd„ˆ jD ƒg ƒˆ _‡ fdd„tˆ jƒD ƒˆ _tˆ jg ƒˆ _d S )N)r   r   zHDataset not found or corrupted. You can use download=True to download itc                 3   s,   | ]$‰ ‡ fd d„t tˆjˆ ƒƒD ƒV  qdS )c                    s   g | ]}t ˆ |ƒ‘qS © r   )Ú.0Úc©Úar   ú\/var/www/html/bwave/python/venv/lib/python3.8/site-packages/torchvision/datasets/omniglot.pyÚ
<listcomp>6   s     z/Omniglot.__init__.<locals>.<genexpr>.<listcomp>N)r   r   Útarget_folder)r   ©Úselfr   r   Ú	<genexpr>6   s     z$Omniglot.__init__.<locals>.<genexpr>c                    s0   g | ](\‰ }‡ fd d„t tˆj|ƒdƒD ƒ‘qS )c                    s   g | ]}|ˆ f‘qS r   r   )r   Úimage©Úidxr   r   r   9   s     z0Omniglot.__init__.<locals>.<listcomp>.<listcomp>z.png)r   r   r    )r   Ú	characterr!   r%   r   r   8   s   ÿz%Omniglot.__init__.<locals>.<listcomp>)ÚsuperÚ__init__r   Úfolderr   r   Ú_check_integrityÚRuntimeErrorr   Ú_get_target_folderr    r   Z
_alphabetsÚsumÚ_charactersÚ	enumerateZ_character_imagesÚ_flat_character_images)r"   r   r   r   r   r   ©Ú	__class__r!   r   r)   "   s      ÿ
þzOmniglot.__init__)r   c                 C   s
   t | jƒS )N)Úlenr1   r!   r   r   r   Ú__len__>   s    zOmniglot.__len__)Úindexr   c                 C   s^   | j | \}}t| j| j| |ƒ}tj|dd� d¡}| jrF|  |¡}| jrV|  |¡}||fS )z 
        Args:
            index (int): Index

        Returns:
            tuple: (image, target) where target is index of the target character class.
        Úr)ÚmodeÚL)	r1   r   r    r/   r	   ÚopenÚconvertr   r   )r"   r6   Z
image_nameZcharacter_classZ
image_pathr$   r   r   r   Ú__getitem__A   s    

zOmniglot.__getitem__c                 C   s,   |   ¡ }tt| j|d ƒ| j| ƒs(dS dS )Nú.zipFT)r-   r   r   r   Úzips_md5)r"   Úzip_filenamer   r   r   r+   U   s    zOmniglot._check_integrityc                 C   sN   |   ¡ rtdƒ d S |  ¡ }|d }| jd | }t|| j|| j| d� d S )Nz%Files already downloaded and verifiedr=   ú/)ÚfilenameÚmd5)r+   Úprintr-   Údownload_url_prefixr   r   r>   )r"   rA   r?   Úurlr   r   r   r   [   s    zOmniglot.downloadc                 C   s   | j r
dS dS )Nr   r   )r   r!   r   r   r   r-   e   s    zOmniglot._get_target_folder)TNNF)Ú__name__Ú
__module__Ú__qualname__Ú__doc__r*   rD   r>   ÚstrÚboolr   r   r)   Úintr5   r   r   r<   r+   r   r-   Ú__classcell__r   r   r2   r   r   
   s.   þ    úù
r   N)Úos.pathr   Útypingr   r   r   r   r   ZPILr	   Úutilsr   r   r   r   Zvisionr   r   r   r   r   r   Ú<module>   s
   