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fix_map.cpython-36.opt-1.pyc
3 \8 � @ sf d Z ddlmZ ddlmZ ddlmZmZmZm Z m Z ddl m Z ddlmZ G dd� dej�Zd S ) a Fixer that changes map(F, ...) into list(map(F, ...)) unless there exists a 'from future_builtins import map' statement in the top-level namespace. As a special case, map(None, X) is changed into list(X). (This is necessary because the semantics are changed in this case -- the new map(None, X) is equivalent to [(x,) for x in X].) We avoid the transformation (except for the special case mentioned above) if the map() call is directly contained in iter(<>), list(<>), tuple(<>), sorted(<>), ...join(<>), or for V in <>:. NOTE: This is still not correct if the original code was depending on map(F, X, Y, ...) to go on until the longest argument is exhausted, substituting None for missing values -- like zip(), it now stops as soon as the shortest argument is exhausted. � )�token)� fixer_base)�Name�ArgList�Call�ListComp�in_special_context)�python_symbols)�Nodec @ s e Zd ZdZdZdZdd� ZdS )�FixMapTaL map_none=power< 'map' trailer< '(' arglist< 'None' ',' arg=any [','] > ')' > [extra_trailers=trailer*] > | map_lambda=power< 'map' trailer< '(' arglist< lambdef< 'lambda' (fp=NAME | vfpdef< '(' fp=NAME ')'> ) ':' xp=any > ',' it=any > ')' > [extra_trailers=trailer*] > | power< 'map' args=trailer< '(' [any] ')' > [extra_trailers=trailer*] > zfuture_builtins.mapc C s� | j |�rd S g }d|kr:x |d D ]}|j|j� � q$W |jjtjkrv| j|d� |j� }d|_t t d�|g�}�n&d|kr�t |d j� |d j� |d j� �}t tj |g| dd �}n�d |kr�|d j� }d|_n�d |k�rj|d }|jtjk�rL|jd jtjk�rL|jd jd jtjk�rL|jd jd jdk�rL| j|d� d S t tj t d�|j� g�}d|_t|��rxd S t tj t d�t|g�g| �}d|_|j|_|S )NZextra_trailersz You should use a for loop here� �listZ map_lambdaZxp�fp�it)�prefixZmap_none�arg�args� � �Nonezjcannot convert map(None, ...) with multiple arguments because map() now truncates to the shortest sequence�map)Z should_skip�appendZclone�parent�type�symsZ simple_stmtZwarningr r r r r ZpowerZtrailerZchildrenZarglistr �NAME�valuer r )�selfZnodeZresultsZtrailers�t�newr � r �-/usr/lib64/python3.6/lib2to3/fixes/fix_map.py� transform@ sF zFixMap.transformN)�__name__� __module__� __qualname__Z BM_compatibleZPATTERNZskip_onr" r r r r! r s r N)�__doc__Zpgen2r r r Z fixer_utilr r r r r Zpygramr r Zpytreer ZConditionalFixr r r r r! �<module> s
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