U
    -c                     @   s    d dl mZ dd fddZdS )    )consumec                 C   s   | S )N )xr   r   9/tmp/pip-unpacked-wheel-izj_87as/setuptools/_itertools.py<lambda>       r   c                 c   sH   t  }|j}| D ]2}||}||kr4td|d|| |V  qdS )a  
    Wrap an iterable to raise a ValueError if non-unique values are encountered.

    >>> list(ensure_unique('abc'))
    ['a', 'b', 'c']
    >>> consume(ensure_unique('abca'))
    Traceback (most recent call last):
    ...
    ValueError: Duplicate element 'a' encountered.
    zDuplicate element z encountered.N)setadd
ValueError)iterablekeyseenZseen_addelementkr   r   r   ensure_unique   s    r   N)Z setuptools.extern.more_itertoolsr   r   r   r   r   r   <module>   s   