[Python-Dev] Let's just *keep* lambda

Phillip J. Eby pje at telecommunity.com
Wed Feb 8 19:16:16 CET 2006

At 10:07 AM 2/8/2006 -0800, Guido van Rossum wrote:
>On 2/8/06, Patrick Collison <patrick at collison.ie> wrote:
> > And to think that people thought that keeping "lambda", but changing
> > the name, would avoid all the heated discussion... :-)
>Note that I'm not participating in any attempts to "improve" lambda.
>Just about the only improvement I'd like to see is to add parentheses
>around the arguments, so you'd write lambda(x, y): x**y instead of
>lambda x, y: x**y.

lambda(x,y) looks like a function call until you hit the ':'; we don't 
usually have keywords that work that way.

How about (lambda x,y: x**y)?  It seems like all the recently added 
constructs (conditionals, yield expressions, generator expressions) take on 
this rather lisp-y look.  :)

Or, if you wanted to eliminate the "lambda" keyword, then "(from x,y return 
x**y)" could be a "function expression", and it looks even more like most 
of the recently-added expression constructs.

Well, actually, I guess to mirror the style of conditionals and genexps 
more closely, it would have to be something like "(return x**y from x,y)" 
or "(x**y from x,y)".

Ugh.  Never mind, let's just leave it the way it is today.  :)

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