[Python-ideas] a new lambda syntax

[Oleg Broytman]

On Mon, Oct 19, 2009 at 10:28:58PM +0800, starwing wrote:
> Oleg Broytman ??????:
>>    Single-line lambdas are good enough,
>> and if you need more - just create a named function.
>>   
> BUT, why we need a name? just to process something or make decide,  
> sometimes code itself is enough.

   A multiline function is certainly not a simple piece of code; it
requires documentation - docstring, comments - and the name is a part of
the documentation.

> and, is there performance problems when you define a inner function in  
> another function? (that's, that function will define every time you call  
> the function or not?)

   A lambda, like an inner function, is recreated every time, so it's
certainly no better than a named function.
   You should profile your program to prove there is really a performance
degradation. And if there is - create a global function instead.

Oleg.
-- 
     Oleg Broytman            http://phd.pp.ru/            phd at phd.pp.ru
           Programmers don't die, they just GOSUB without RETURN.