j f @sudZddlmZddlmZddlmZmZmZm Z ddl m Z Gdddej ZdS) aFixer 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)NameCallListCompin_special_context)python_symbolsc@s.eZdZdZdZdZddZdS)FixMapTa map_none=power< 'map' trailer< '(' arglist< 'None' ',' arg=any [','] > ')' > > | map_lambda=power< 'map' trailer< '(' arglist< lambdef< 'lambda' (fp=NAME | vfpdef< '(' fp=NAME ')'> ) ':' xp=any > ',' it=any > ')' > > | power< 'map' trailer< '(' [arglist=any] ')' > > zfuture_builtins.mapcCs|j|rdS|jjtjkrh|j|d|j}d|_tt d|g}n d|krt |dj|dj|dj}nd|kr|d j}nd |kr4|d }|jtj kr4|j d jt jkr4|j d jd kr4|j|d dSnt|rDdS|j}d|_tt d|g}|j|_|S)NzYou should use a for loop herelistZ map_lambdaZxpfpitZmap_noneargarglistNonezjcannot convert map(None, ...) with multiple arguments because map() now truncates to the shortest sequence)Z should_skipparenttypesymsZ simple_stmtZwarningZcloneprefixrrrrZchildrenrNAMEvaluer)selfZnodeZresultsnewargsr:/opt/alt/python34/lib64/python3.4/lib2to3/fixes/fix_map.py transform;s6           zFixMap.transformN)__name__ __module__ __qualname__Z BM_compatibleZPATTERNZskip_onrrrrrr s r N)__doc__Zpgen2rr rZ fixer_utilrrrrZpygramrrZConditionalFixr rrrrs "