U
    9%e                     @   sn   d dl Z d dlmZ d dlmZ d dlmZ d dlmZ d dl	m
Z
mZ d dlmZ dgZG d	d deZdS )
    N)constraints)Exponential)euler_constant)TransformedDistribution)AffineTransformPowerTransform)broadcast_allWeibullc                       sp   e Zd ZdZejejdZejZd fdd	Zd fdd	Z	e
dd	 Ze
d
d Ze
dd Zdd Z  ZS )r	   a  
    Samples from a two-parameter Weibull distribution.

    Example:

        >>> # xdoctest: +IGNORE_WANT("non-deterinistic")
        >>> m = Weibull(torch.tensor([1.0]), torch.tensor([1.0]))
        >>> m.sample()  # sample from a Weibull distribution with scale=1, concentration=1
        tensor([ 0.4784])

    Args:
        scale (float or Tensor): Scale parameter of distribution (lambda).
        concentration (float or Tensor): Concentration parameter of distribution (k/shape).
    )scaleconcentrationNc                    sb   t ||\| _| _| j | _tt| j|d}t| jdt	d| jdg}t
 j|||d d S )Nvalidate_argsexponentr   locr
   )r   r
   r   
reciprocalconcentration_reciprocalr   torchZ	ones_liker   r   super__init__)selfr
   r   r   	base_dist
transforms	__class__ Z/var/www/html/Darija-Ai-API/env/lib/python3.8/site-packages/torch/distributions/weibull.pyr   !   s    
 
zWeibull.__init__c                    s|   |  t|}| j||_| j||_|j |_| j|}t|jdt	d|jdg}t
t|j||dd | j|_|S )Nr   r   r   Fr   )Z_get_checked_instancer	   r
   expandr   r   r   r   r   r   r   r   Z_validate_args)r   Zbatch_shapeZ	_instancenewr   r   r   r   r   r   -   s    
zWeibull.expandc                 C   s   | j ttd| j  S N   )r
   r   explgammar   r   r   r   r   mean;   s    zWeibull.meanc                 C   s    | j | jd | j | j   S r    )r
   r   r   r$   r   r   r   mode?   s    zWeibull.modec              	   C   s@   | j dttdd| j  tdtd| j    S )N   r!   )r
   powr   r"   r#   r   r$   r   r   r   varianceG   s
    
zWeibull.variancec                 C   s$   t d| j  t| j| j  d S r    )r   r   r   logr
   r$   r   r   r   entropyN   s    zWeibull.entropy)N)N)__name__
__module____qualname____doc__r   ZpositiveZarg_constraintsZsupportr   r   propertyr%   r&   r)   r+   __classcell__r   r   r   r   r	      s   


)r   Ztorch.distributionsr   Ztorch.distributions.exponentialr   Ztorch.distributions.gumbelr   Z,torch.distributions.transformed_distributionr   Ztorch.distributions.transformsr   r   Ztorch.distributions.utilsr   __all__r	   r   r   r   r   <module>   s   