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    a                 @   sH   d dl mZmZ d dlmZmZ d dlmZ eeG dd deZ	dS )    )absolute_importunicode_literals)ABCMetaabstractmethod)add_metaclassc               @   s<   e Zd ZdZedd Zdd Zedd Ze	dd	 Z
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S )Discoverz5Discover and provide the requested Python interpreterc             C   s   t dS )z`Add CLI arguments for this discovery mechanisms.

        :param parser: the CLI parser
        N)NotImplementedError)clsparser r   N/opt/alt/python37/lib/python3.7/site-packages/virtualenv/discovery/discover.pyadd_parser_arguments   s    zDiscover.add_parser_argumentsc             C   s   d| _ d| _|j| _dS )zCreate a new discovery mechanism.

        :param options: the parsed options as defined within :meth:`add_parser_arguments`
        FN)_has_run_interpreterenvZ_env)selfoptionsr   r   r   __init__   s    zDiscover.__init__c             C   s   t dS )zsDiscovers an interpreter.


        :return: the interpreter ready to use for virtual environment creation
        N)r   )r   r   r   r   run   s    zDiscover.runc             C   s    | j dkr|  | _d| _ | jS )zM
        :return: the interpreter as returned by :meth:`run`, cached
        FT)r   r   r   )r   r   r   r   interpreter'   s    

zDiscover.interpreterN)__name__
__module____qualname____doc__classmethodr   r   r   r   propertyr   r   r   r   r   r      s
   			r   N)

__future__r   r   abcr   r   Zsixr   objectr   r   r   r   r   <module>   s   