B
    €™b,  ã               @   sÂ   d dl mZ d dlZd dlZd dlZd dlZdZG dd„ dƒZ	e
dkr¾e	ƒ Ze d¡Ze d¡\ZZe ¡  ¡ Ze ¡  ¡ Zx@edƒD ]4Zejee  ddg¡dd	 eee ƒ e ¡  q†W dS )
é    Nz../../../../DL/MNIST/c               @   s<   e Zd Zdd„ Zdd„ Zdd„ Zdd„ Zd	d
„ Zdd„ ZdS )ÚMNISTc             C   st   |   tj td¡¡| _|   tj td¡¡| _|  tj td¡¡| _|  tj td¡¡| _	d| _
d| _d| _d| _d S )Nztrain-images-idx3-ubyte.gzzt10k-images-idx3-ubyte.gzztrain-labels-idx1-ubyte.gzzt10k-labels-idx1-ubyte.gzr   )Ú	load_imgsÚosÚpathÚjoinÚ
mnist_pathÚ
train_imgsÚ	test_imgsÚload_labelsZtrain_labelsÚtest_labelsÚepochsÚcursorÚtest_epochsÚtest_cursor)Úself© r   ú9/Users/wangjiarui/Desktop/Learn/CS236/HW/HW2_VAE/MNIST.pyÚ__init__   s    zMNIST.__init__c             C   s´   | j | t| jƒk rFt | j| j | j | … ¡ ¡ }|  j |7  _ |S g }| | j| j d … ¡ | j | t| jƒ }| | jd |… ¡ || _ |  jd7  _t t 	|¡¡ ¡ S d S )Né   )
r   Úlenr   ÚtorchÚ
from_numpyÚfloatÚappendr   ÚnpÚconcatenate)r   Ú
batch_sizeÚXÚ
new_cursorr   r   r   Ú
load_batch   s     zMNIST.load_batchc             C   s*  | j | t| jƒk rnt | j| j | j | … ¡ ¡ }t | j| j | j | … ¡}|  j |7  _ || tj¡fS g }g }| 	| j| j d … ¡ | 	| j| j d … ¡ | j | t| jƒ }| 	| jd |… ¡ | 	| jd |… ¡ || _ |  j
d7  _
t t |¡¡ ¡ }t t |¡¡}|| tj¡fS d S )Nr   )r   r   r	   r   r   r   r   ÚtypeÚ
LongTensorr   r   r   r   )r   r   ÚimgsÚlabelsr   Úyr   r   r   r   Úload_batch_with_label+   s"     zMNIST.load_batch_with_labelc             C   s*   t j dt| jƒ|¡}t | j| ¡ ¡ S )Nr   )r   ÚrandomÚrandintr   r	   r   r   r   )r   r   Úidxr   r   r   Ú	load_testB   s    zMNIST.load_testc          	   C   s@   t  |¡,}tj| ¡ ddd}| dd¡ d¡d S Q R X d S )NÚBé   )Úoffsetéÿÿÿÿi  Úfloat32éÿ   )ÚgzipÚopenr   Ú
frombufferÚreadÚreshapeÚastype)r   r   ÚfÚpixelsr   r   r   r   F   s    zMNIST.load_imgsc          	   C   s4   t  |¡ }tj| ¡ ddd}t |¡S Q R X d S )Nr*   é   )r,   )r0   r1   r   r2   r3   Úarray)r   r   r6   Zinteger_labelsr   r   r   r
   K   s    zMNIST.load_labelsN)	Ú__name__Ú
__module__Ú__qualname__r   r   r%   r)   r   r
   r   r   r   r   r      s   r   Ú__main__é
   é   Úgray)Úcmap)Úmatplotlib.pyplotÚpyplotÚpltÚnumpyr   r   r0   r   r   r   r:   Úmnistr   r   r%   ÚimgÚlabelÚdetachÚrangeÚiÚimshowr4   ÚprintÚshowr   r   r   r   Ú<module>   s    O
