Why no tailcall-optimization?

[Aaron "Castironpi" Brady]

On Sep 22, 8:13 pm, process <circularf... at gmail.com> wrote:
> Why doesn't Python optimize tailcalls? Are there plans for it?
>
> I know GvR dislikes some of the functional additions like reduce and
> Python is supposedly about "one preferrable way of doing things" but
> not being able to use recursion properly is just a big pain in the
> a**.

I didn't think this through completely-- is it incompatible with
closures and local function definitions?

def f( m ):
   def g( n ):
      return m+ n
   stuff( )
   return g( 0 )

In this case, the stack, growing up:

g
f
main

is not equivalent to:

g
main

in the last step, due to the local definition of 'm' in 'f'.