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This function is deprecated. c sV t jdtdd� � | i |��}t|dd �d u rR|j|_t|d�sR|j�d�d |_|S )N�7The import system now takes care of this automatically.� �� stacklevel� __package__r) r r )�warnings�warn�DeprecationWarning�getattr�__name__r? �hasattrr+ )�args�kwargsr& ��fxnr r �set_package_wrapper� s � z(set_package.<locals>.set_package_wrapper�� functools�wraps)rI rJ r rH r � set_package� s rN c s t �� �� fdd��}|S )zNSet __loader__ on the returned module. This function is deprecated. c s@ t jdtdd� � | g|�R i |��}t|dd �d u r<| |_|S )Nr; r< r= � __loader__)r@ rA rB rC rO )�selfrF rG r& rH r r �set_loader_wrapper� s �z&set_loader.<locals>.set_loader_wrapperrK )rI rQ r rH r � set_loader� s rR c s* t jdtdd� t�� �� fdd��}|S )a* Decorator to handle selecting the proper module for loaders. The decorated function is passed the module to use instead of the module name. The module passed in to the function is either from sys.modules if it already exists or is a new module. If the module is new, then __name__ is set the first argument to the method, __loader__ is set to self, and __package__ is set accordingly (if self.is_package() is defined) will be set before it is passed to the decorated function (if self.is_package() does not work for the module it will be set post-load). If an exception is raised and the decorator created the module it is subsequently removed from sys.modules. The decorator assumes that the decorated function takes the module name as the second argument. r; r< r= c s� t |��p}| |_z| �|�}W n ttfy4 Y n 0 |rB||_n|�d�d |_� | |g|�R i |��W d � S 1 s~0 Y d S )Nr r )r: rO � is_packager r" r? r+ )rP r. rF rG r& rS rH r r �module_for_loader_wrapper� s z4module_for_loader.<locals>.module_for_loader_wrapper)r@ rA rB rL rM )rI rT r rH r �module_for_loader� s �rU c @ s e Zd ZdZdd� Zdd� ZdS )� _LazyModulezKA subclass of the module type which triggers loading upon attribute access.c C s� t j| _| jj}| jjd }| jjd }| j}i }|�� D ]:\}}||vrT|||< q:t|| �t|| �kr:|||< q:| jj � | � |t j v r�t| �tt j | �kr�t d|�d���| j�|� t| |�S )z8Trigger the load of the module and return the attribute.�__dict__� __class__zmodule object for z. substituted in sys.modules during a lazy load)�types� ModuleTyperX r! r � loader_staterW �items�id�loader� exec_moduler r r# �updaterC ) rP �attr� original_name� attrs_then� original_type� attrs_now� attrs_updated�key�valuer r r �__getattribute__� s" z _LazyModule.__getattribute__c C s | � |� t| |� dS )z/Trigger the load and then perform the deletion.N)ri �delattr)rP ra r r r � __delattr__ s z_LazyModule.__delattr__N)rD � __module__� __qualname__�__doc__ri rk r r r r rV � s #rV c @ s@ e Zd ZdZedd� �Zedd� �Zdd� Zdd � Z d d � Z d S ) � LazyLoaderzKA loader that creates a module which defers loading until attribute access.c C s t | d�std��d S )Nr_ z loader must define exec_module())rE � TypeError)r^ r r r �__check_eager_loader s z LazyLoader.__check_eager_loaderc s � � �� � �fdd�S )z>Construct a callable which returns the eager loader made lazy.c s � �| i |���S �Nr )rF rG ��clsr^ r r �<lambda> � z$LazyLoader.factory.<locals>.<lambda>)� _LazyLoader__check_eager_loaderrs r rs r �factory s zLazyLoader.factoryc C s | � |� || _d S rr )rw r^ )rP r^ r r r �__init__ s zLazyLoader.__init__c C s | j �|�S rr )r^ � create_module)rP r' r r r rz s zLazyLoader.create_modulec C s@ | j |j_ | j |_i }|j�� |d< |j|d< ||j_t|_dS )z Make the module load lazily.rW rX N)r^ r! rO rW �copyrX r[ rV )rP r& r[ r r r r_ s zLazyLoader.exec_moduleN) rD rl rm rn � staticmethodrw � classmethodrx ry rz r_ r r r r ro s ro )N)N)"rn � r � _bootstrapr r r r �_bootstrap_externalr r r r r r � contextlibr r rL r rY r@ r r r( r3 r: rN rR rU rZ rV �Loaderro r r r r �<module> s8 - '/
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