Exporting functions and variables from a module.

gistfile1.py

# exports.py

import sys

class Exports(object):

    def __getattr__(self, name):
        context = sys._getframe().f_back.f_globals
        return context[name]

    def __setattr__(self, name, value):
        context = sys._getframe().f_back.f_globals
        context[name] = value
        exported = context.setdefault('__all__', [])
        if name not in exported:
            exported.append(name)

    def __call__(self):
        return sys._getframe().f_back.f_globals

exports = Exports()

def export(wrapped):
    context = sys._getframe().f_back.f_globals
    exported = context.setdefault('__all__', [])
    name = wrapped.__name__
    if name not in exported:
        exported.append(name)
    return wrapped

# check.py

from exports import exports, export

exports.VARNAME = 'VALUE'

@export
def func():
    return VARNAME

print __all__
print exports()

# test

$ python
Python 2.7.2 (default, Oct 11 2012, 20:14:37)
[GCC 4.2.1 Compatible Apple Clang 4.0 (tags/Apple/clang-418.0.60)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> from check import *
['VARNAME', 'func']
['VARNAME', 'func']
>>> print VARNAME
VALUE
>>> func()
'VALUE'