ACC SHELL
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sÄMc @ su d Z d d k l Z d d k l Z d d k l Z l Z l Z l Z d d k
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f d „ ƒ YZ d S( s 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.
i ( t token( t
fixer_base( t Namet Callt ListCompt in_special_context( t python_symbolst FixMapc B s e Z d Z d Z d „ Z RS( sé
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] ')' >
>
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map_lambdat xpt fpt itt map_nonet argt arglisti t Nonesj cannot convert map(None, ...) with multiple arguments because map() now truncates to the shortest sequence( t should_skipt parentt typet symst simple_stmtt warningt clonet prefixR R R R t childrenR t NAMEt valueR R ( t selft nodet resultst newt args( ( s+ /usr/lib/python2.6/lib2to3/fixes/fix_map.pyt transform: s6
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ACC SHELL 2018