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The module is not added to its parent. If a module is already in sys.modules, that existing module gets clobbered. N)r? r r� �rv r r r rt � s $�rt c @ s� e Zd ZdZdZedd� �Zeddd��Zeddd ��Z ed d � �Z ed d � �Z ee dd� ��Z ee dd� ��Zee dd� ��Zee�ZdS )�BuiltinImporterz�Meta path import for built-in modules. All methods are either class or static methods to avoid the need to instantiate the class. zbuilt-inc C s" t �dt� d| j�dtj� d�S )�sReturn repr for the module. The method is deprecated. The import machinery does the job itself. zQBuiltinImporter.module_repr() is deprecated and slated for removal in Python 3.12z<module z (z)>)rn ro rp r r� r� �rw r r r r{ � s �zBuiltinImporter.module_reprNc C s* |d urd S t �|�rt|| | jd�S d S �Nr� )rG � is_builtinrq r� ��clsrb �path�targetr r r � find_spec� s zBuiltinImporter.find_specc C s* t �dt� | �||�}|dur|jS dS )z�Find the built-in module. If 'path' is ever specified then the search is considered a failure. This method is deprecated. Use find_spec() instead. zjBuiltinImporter.find_module() is deprecated and slated for removal in Python 3.12; use find_spec() insteadN)rn ro rp r� r� )r� rb r� rv r r r � find_module� s � zBuiltinImporter.find_modulec C s. | j tjvrtd�| j �| j d��ttj| �S )zCreate a built-in moduler^ r )r r r_ r` r8 rR rG �create_builtinr� r r r r� s � z BuiltinImporter.create_modulec C s t tj| � dS )zExec a built-in moduleN)rR rG � exec_builtinr� r r r r� s zBuiltinImporter.exec_modulec C � dS )z9Return None as built-in modules do not have code objects.Nr �r� rb r r r �get_code � zBuiltinImporter.get_codec C r� )z8Return None as built-in modules do not have source code.Nr r� r r r � get_source r� zBuiltinImporter.get_sourcec C r� )z4Return False as built-in modules are never packages.Fr r� r r r r� r� zBuiltinImporter.is_package�NNr )r r r r r� � staticmethodr{ � classmethodr� r� r� r� rh r� r� r� rx r� r r r r r� � s. r� c @ s� e Zd ZdZdZedd� �Zeddd��Zeddd ��Z ed d � �Z ed d � �Z edd� �Z ee dd� ��Zee dd� ��Zee dd� ��ZdS )�FrozenImporterz�Meta path import for frozen modules. All methods are either class or static methods to avoid the need to instantiate the class. �frozenc C s t �dt� d�| jtj�S )r� zPFrozenImporter.module_repr() is deprecated and slated for removal in Python 3.12r� )rn ro rp r8 r r� r� )�mr r r r{ / s �zFrozenImporter.module_reprNc C s t �|�r t|| | jd�S d S r� )rG rk rq r� r� r r r r� : s zFrozenImporter.find_specc C s t �dt� t�|�r | S dS )z]Find a frozen module. This method is deprecated. Use find_spec() instead. ziFrozenImporter.find_module() is deprecated and slated for removal in Python 3.12; use find_spec() insteadN)rn ro rp rG rk )r� rb r� r r r r� A s �zFrozenImporter.find_modulec C r� )z*Use default semantics for module creation.Nr r� r r r r� M s z FrozenImporter.create_modulec C s@ | j j}t�|�std�|�|d��ttj|�}t|| j � d S rj ) rz r rG rk r` r8 rR �get_frozen_object�execr )rw r �coder r r r� Q s � zFrozenImporter.exec_modulec C s t | |�S )z_Load a frozen module. This method is deprecated. Use exec_module() instead. )rx r� r r r r� Z s zFrozenImporter.load_modulec C � t �|�S )z-Return the code object for the frozen module.)rG r� r� r r r r� d � zFrozenImporter.get_codec C r� )z6Return None as frozen modules do not have source code.Nr r� r r r r� j r� zFrozenImporter.get_sourcec C r� )z.Return True if the frozen module is a package.)rG �is_frozen_packager� r r r r� p r� zFrozenImporter.is_packager� r )r r r r r� r� r{ r� r� r� r� r� r� rm r� r� r� r r r r r� $ s0 r� c @ s e Zd ZdZdd� Zdd� ZdS )�_ImportLockContextz$Context manager for the import lock.c C � t �� dS )zAcquire the import lock.N)rG rH r: r r r rC } � z _ImportLockContext.__enter__c C r� )z<Release the import lock regardless of any raised exceptions.N)rG rJ )r% �exc_type� exc_value� exc_tracebackr r r rF � r� z_ImportLockContext.__exit__N)r r r r rC rF r r r r r� y s r� c C s@ |� d|d �}t|�|k rtd��|d }| r d�|| �S |S )z2Resolve a relative module name to an absolute one.r� r0 z2attempted relative import beyond top-level packager �{}.{})�rsplit�lenr` r8 )r �package�level�bits�baser r r � _resolve_name� s r� c C s< t | �� d�}t�|t� | �||�}|d u rd S t||�S )Nz5.find_spec() not found; falling back to find_module())r rn ro r� r� rq )�finderr r� ru r� r r r �_find_spec_legacy� s r� c C s t j}|du r td��|st�dt� | t jv }|D ]o}t� �/ z|j}W n t y@ t || |�}|du r>Y W d � qY nw || ||�}W d � n1 sQw Y |dur�|s�| t jv r�t j| }z|j } W n t yx | Y S w | du r�| S | S | S qdS )zFind a module's spec.Nz5sys.meta_path is None, Python is likely shutting downzsys.meta_path is empty) r � meta_pathr` rn ro r� rr r� r� r r� rz ) r r� r� r� � is_reloadr� r� rv rw rz r r r � _find_spec� sD �� � � ��r� c C sn t | t�std�t| ����|dk rtd��|dkr)t |t�s#td��|s)td��| s3|dkr5td��dS dS )z Verify arguments are "sane".z module name must be str, not {}r zlevel must be >= 0z __package__ not set to a stringz6attempted relative import with no known parent packagezEmpty module nameN)� isinstance�str� TypeErrorr8 r � ValueErrorr` �r r� r� r r r � _sanity_check� s �r� zNo module named z{!r}c C s d }| � d�d }|r@|tjvrt||� | tjv r tj| S tj| }z|j}W n ty? td �| |�}t|| d�d �w t | |�}|d u rRtt�| �| d��t |�}|r�tj| }| � d�d }z t |||� W |S ty� d|�d|��}t � |t� Y |S w |S )Nr� r z; {!r} is not a packager � zCannot set an attribute on z for child module )r� r rr rR r� r �_ERR_MSGr8 �ModuleNotFoundErrorr� r� r rn ro r� ) r �import_r� r� � parent_moduleru rv rw �childr r r �_find_and_load_unlocked� s< � ��r� c C s� t | �� tj�| t�}|tu r t| |�W d � S W d � n1 s&w Y |du r:d�| �}t|| d��t| � |S )zFind and load the module.Nz(import of {} halted; None in sys.modulesr ) r? r rr r* �_NEEDS_LOADINGr� r8 r� rO )r r� rw r[ r r r �_find_and_load� s � �� r� r c C s* t | ||� |dkrt| ||�} t| t�S )a2 Import and return the module based on its name, the package the call is being made from, and the level adjustment. This function represents the greatest common denominator of functionality between import_module and __import__. This includes setting __package__ if the loader did not. r )r� r� r� � _gcd_importr� r r r r s r �� recursivec C s� |D ]h}t |t�s |r| jd }nd}td|� dt|�j� ���|dkr5|s4t| d�r4t| | j|dd� qt| |�sjd �| j|�}zt ||� W q t yi } z|j |krdt j �|t�d urdW Y d }~q� d }~ww q| S ) z�Figure out what __import__ should return. The import_ parameter is a callable which takes the name of module to import. It is required to decouple the function from assuming importlib's import implementation is desired. z.__all__z ``from list''zItem in z must be str, not �*�__all__Tr r� N)r� r� r r� r r �_handle_fromlistr r8 rR r� r r rr r* r� )rw �fromlistr� r �x�where� from_name�excr r r r s6 � �� ��� r c C s� | � d�}| � d�}|dur)|dur'||jkr'tjd|�d|j�d�tdd� |S |dur0|jS tjd tdd� | d }d | vrG|�d �d }|S )z�Calculate what __package__ should be. __package__ is not guaranteed to be defined or could be set to None to represent that its proper value is unknown. r� rz Nz __package__ != __spec__.parent (z != �)� )� stacklevelzYcan't resolve package from __spec__ or __package__, falling back on __name__ and __path__r r� r� r )r* r� rn ro r� r� )�globalsr� rv r r r �_calc___package__B s* ����r r c C s� |dkr t | �}n|dur|ni }t|�}t | ||�}|sJ|dkr*t | �d�d �S | s.|S t| �t| �d�d � }tj|jdt|j�| � S t|d�rUt||t �S |S )a� Import a module. The 'globals' argument is used to infer where the import is occurring from to handle relative imports. The 'locals' argument is ignored. The 'fromlist' argument specifies what should exist as attributes on the module being imported (e.g. ``from module import <fromlist>``). The 'level' argument represents the package location to import from in a relative import (e.g. ``from ..pkg import mod`` would have a 'level' of 2). r Nr� r� ) r r � partitionr� r rr r r r ) r r �localsr r� rw �globals_r� �cut_offr r r � __import__] s r c C s& t �| �}|d u rtd| ��t|�S )Nzno built-in module named )r� r� r` r� )r rv r r r �_builtin_from_name� s r c C s� |a | att�}tj�� D ]$\}}t||�r1|tjv r t}n t �|�r&t }nq t ||�}t ||� q tjt }dD ]}|tjvrEt |�} ntj| } t||| � q9dS )z�Setup importlib by importing needed built-in modules and injecting them into the global namespace. As sys is needed for sys.modules access and _imp is needed to load built-in modules, those two modules must be explicitly passed in. )r rn rN N)rG r r rr �itemsr� r_ r� rk r� r� r� r r r ) � sys_module� _imp_module� module_typer rw r� rv � self_module� builtin_name�builtin_moduler r r �_setup� s( � �r c C s& t | |� tj�t� tj�t� dS )z0Install importers for builtin and frozen modulesN)r r r� r� r� r� )r r r r r �_install� s r c C s ddl } | a| �tjt � dS )z9Install importers that require external filesystem accessr N)�_frozen_importlib_externalr� r r rr r )r r r r �_install_external_importers� s r r� r r )NNr r )6r r r rn rN r� r r rI r) r5 r r r= r? rB rO rR r\ rh rm rx r� r� rq r� r� r� r� rs r� r� rt r� r� r� r� r� r� r� �_ERR_MSG_PREFIXr� r� �objectr� r� r r r r r r r r r r r r �<module> sh M% e -H $-PU / % %#
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