Inheritance/scope problem

.gitignore

*.sw[po]
*.pyc

foocmd.py

#!/usr/bin/python
# -*- coding: utf-8 -*-
from __future__ import print_function
import cmd

class FooCmd(cmd.Cmd, object):
    """Foo command processor example."""

    def __init__(self, mytuple=(), **kwds):
        super(FooCmd, self).__init__(**kwds) 
        self.mytuple = mytuple

    def do_stuff(self, line):
        """Print stuff"""
        print("stuff")

    def do_args(self, line):
        print(self.mytuple)

main.py

#!/usr/bin/python
# -*- coding: utf-8 -*-
from __future__ import print_function
import foocmd

mycmd = foocmd.FooCmd(mytuple=('one', 'two', 'three'))

mycmd.cmdloop()

working.py

#!/usr/bin/python
# -*- coding: utf-8 -*-
from __future__ import print_function

class Foo(object):
    def __init__(self, fooarg='foob', **kwds):
        self.fooarg = fooarg

class Bar(Foo):
    def __init__(self, bararg='barb', **kwds):
        super(Bar, self).__init__(**kwds)
        self.bararg = bararg


myobj = Bar(timmy='twotone')

print(myobj.fooarg)
print(myobj.bararg)