_formatparam(), set_param(): RFC 2231 encoding support by Oleg Broytmann in SF patch #600096. Specifically, the former function now encodes the triplets, while the latter adds optional charset and language arguments.

"""This is a test"""
import __future__
from __future__ import nested_scopes

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

print f(2)(4)