Fun and games with lambda

[Lalitha Prasad K]

I would rate it as a great example of human ingenuity

Lalit

On Fri, Jun 17, 2011 at 9:40 PM, Steven D'Aprano <
steve+comp.lang.python at pearwood.info> wrote:

> If you've ever wondered what lambda and reduce are good for, run this one-
> liner and wonder no more...
>
> (Be patient, it may take a few seconds to return.)
>
> # Python 2 version:
>
> print((lambda f:((lambda p:p[0]+'.'+p[1:])(str((lambda Q:2*Q[0]*Q[0]//Q
> [3])((lambda F:(lambda S:f(lambda T,_:((T[0]+T[1])//2,S((T[0]*T[1])//
> F),2*T[2],(T[3]-(T[2]*(((T[0]+T[1])//2)**2-(S((T[0]*T[1])//F))**2))//F)),
> [0]*13,(F,(F*F)//S(2*F),2,F//2)))(lambda n:f(lambda x,_:(x-x//2+(n*F)//
> (2*x)),[0]*15,n//2)))(10**(5010))))[:5000])))(reduce))
>
> # Python 3 version:
>
> print((lambda f:((lambda p:p[0]+'.'+p[1:])(str((lambda Q:2*Q[0]*Q[0]//Q
> [3])((lambda F:(lambda S:f(lambda T,_:((T[0]+T[1])//2,S((T[0]*T[1])//
> F),2*T[2],(T[3]-(T[2]*(((T[0]+T[1])//2)**2-(S((T[0]*T[1])//F))**2))//F)),
> [0]*13,(F,(F*F)//S(2*F),2,F//2)))(lambda n:f(lambda x,_:(x-x//2+(n*F)//
> (2*x)),[0]*15,n//2)))(10**(5010))))[:5000])))(__import__
> ('functools').reduce))
>
>
> I can't take credit for this little beauty. It originally came from
> Manuel Garcia, all I did was make it compatible with Python 3 and add
> some additional, but trivial, obfuscation.
>
> See the original post here:
> http://web.archiveorange.com/archive/v/5H3d1yQN5N15HEgOWHMx
>
>
>
> Encouraging-hatred-of-lambdas-for-fun-and-profit-ly y'rs,
>
>
> --
> Steven
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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