Changes from Jonathan Riehl to allow his pgen extension (PEP 269) to work. This includes some more code that used to be part of pgen in the main parser; I'm okay with that. I'll see if the Windows build needs work next.

from __future__ import nested_scopes
from __future__ import division
from __future__ import nested_scopes

def f(x):
    def g(y):
        return y // x
    return g


print f(2)(5)