config.py

# see flask.config

import imp


class Config(dict):

    def __init__(self, filename=None):
        if filename:
            self.from_pyfile(filename)
        else:
            dict.__init__({})

    def from_pyfile(self, filename):
        d = imp.new_module('config')
        d.__file__ = filename
        execfile(filename, d.__dict__)
        for key in dir(d):
            self[key] = getattr(d, key)

my_config

SPAM = 1
HAM = 'foo bar baz'
EGGS = (
  'foo',
	'bar',
	'baz'
)

test_config.py

import unittest
from config import Config


class TestConfig(unittest.TestCase):

    def test_basic(self):
        c = Config('my_config')
        self.assertEqual(c['SPAM'], 1)
        self.assertEqual(c['HAM'], 'foo bar baz')
        eggs = ('foo', 'bar', 'baz')
        self.assertEqual(c['EGGS'], eggs)


if __name__ == '__main__':
    unittest.main()