+
−def environment():
+
−    print 'hi'
+
−
+
−class Foo(object):
+
−    environment = environment
+
−
+
−foo = Foo()
+
−
+
−class Bar(object):
+
−    def __init__(self):
+
−        self.environment = environment
+
−bar = Bar()
+
−
+
−import unittest
+
−class TestBinding(unittest.TestCase):
+
−    """weird!"""
+
−    def test_binding(self):
+
−        self.assertEqual(foo.environment, environment)
+
−    def test_class_level(self):
+
−        self.assertEqual(Foo.environment, environment)
+
−    def test_on_init(self):
+
−        self.assertEqual(bar.environment, environment)
+
−
+
−if __name__ == '__main__':
+
−    unittest.main()