how to import __future__ for keyword-only argument of python 3.0?

Question

The following code in python2.6 throws syntax error

>>> def f(a,*args,c):
  File \"\", line 1
    def f(a,*args,c):
                  ^         


        

Answer 1

This feature of the Python 3 compiler has not been backported to Python 2.x.

There is no magic from __future__ import switch to enable it, your only option is to upgrade to Python 3.x.

Your second function could instead be defined as:

def (a, *b, **kwargs):
   c = kwargs.pop('c', 5)

to be Python 2 compatible.