Patch Configuration provider to raise AttributeError for special attributes

src/dependency_injector/providers.pyx

@@ -641,11 +641,17 @@ cdef class Configuration(Provider):
         """
         return represent_provider(provider=self, provides=self.__name)
 
-    def __getattr__(self, name):
+    def __getattr__(self, str name):
         """Return child configuration provider."""
         cdef Configuration child_provider
         cdef object value
 
+        if name.startswith('__'):
+            raise AttributeError(
+                '\'{cls}\' object has no attribute '
+                '\'{attribute_name}\''.format(cls=self.__class__.__name__,
+                                              attribute_name=name))
+
         child_provider = self.__children.get(name)
 
         if child_provider is None:

tests/unit/providers/test_configuration.py

@@ -63,6 +63,15 @@ class ConfigTests(unittest.TestCase):
     def test_value_of_undefined_option(self):
         self.assertIsNone(self.config.a())
 
+    def test_getting_of_special_attributes(self):
+        with self.assertRaises(AttributeError):
+            self.config.__name__
+
+    def test_getting_of_special_attributes_from_child(self):
+        a = self.config.a
+        with self.assertRaises(AttributeError):
+            a.__name__
+
     def test_deepcopy(self):
         provider = providers.Configuration('config')
         provider_copy = providers.deepcopy(provider)