diff --git a/jedi/api/__init__.py b/jedi/api/__init__.py
index a629d608..34c968d8 100644
--- a/jedi/api/__init__.py
+++ b/jedi/api/__init__.py
@@ -367,19 +367,11 @@ class Interpreter(Script):
         super(Interpreter, self).__init__(source, **kwds)
         self.namespaces = namespaces
 
-        # Don't use the fast parser, because it does crazy stuff that we don't
-        # need in our very simple and small code here (that is always
-        # changing).
-        self._parser = UserContextParser(self._grammar, self._source,
-                                         self._orig_path, self._pos,
-                                         self._parsed_callback,
-                                         use_fast_parser=False)
-        #interpreter.add_namespaces_to_parser(self._evaluator, namespaces,
-                                             #self._get_module())
+        parser_module = super(Interpreter, self)._get_module()
+        self._module = interpreter.MixedModule(self._evaluator, parser_module, self.namespaces)
 
     def _get_module(self):
-        parser_module = super(Interpreter, self)._get_module()
-        return interpreter.MixedModule(parser_module, self.namespaces)
+        return self._module
 
 
 def defined_names(source, path=None, encoding='utf-8'):
diff --git a/jedi/api/classes.py b/jedi/api/classes.py
index 50827221..07195c6b 100644
--- a/jedi/api/classes.py
+++ b/jedi/api/classes.py
@@ -16,6 +16,7 @@ from jedi.evaluate import representation as er
 from jedi.evaluate import iterable
 from jedi.evaluate import imports
 from jedi.evaluate import compiled
+from jedi.evaluate.compiled import mixed
 from jedi.api import keywords
 from jedi.evaluate.finder import filter_definition_names
 
@@ -148,7 +149,7 @@ class BaseDefinition(object):
         if isinstance(stripped, er.InstanceElement):
             stripped = stripped.var
 
-        if isinstance(stripped, compiled.CompiledObject):
+        if isinstance(stripped, (compiled.CompiledObject, mixed.MixedObject)):
             return stripped.api_type()
         elif isinstance(stripped, iterable.Array):
             return 'instance'
diff --git a/jedi/api/interpreter.py b/jedi/api/interpreter.py
index 6332854e..2511b144 100644
--- a/jedi/api/interpreter.py
+++ b/jedi/api/interpreter.py
@@ -15,37 +15,38 @@ from jedi.parser import load_grammar
 from jedi.parser.fast import FastParser
 from jedi.evaluate import helpers
 from jedi.evaluate import iterable
+from jedi.evaluate.representation import ModuleWrapper
 from jedi.evaluate.compiled import mixed
 
 
-def add_namespaces_to_parser(evaluator, namespace_dicts, parser_module):
-    for dct in namespace_dicts:
-        namespace = compiled.CompiledObject(evaluator, type('namespace', (), dct))
+class MixedModule(object):
+    resets_positions = True
 
-        for key, value in dct.items():
-            # Name lookups in an ast tree work by checking names_dict.
-            # Therefore we just add fake names to that and we're done.
-            arr = parser_module.names_dict.setdefault(key, [])
-            name = mixed.MixedName(evaluator, namespace, key)
-            arr.append(name)
-            #arr.append(LazyName(evaluator, parser_module, key, value))
-
-
-class MixedModule():
     def __init__(self, evaluator, parser_module, namespaces):
         self._evaluator = evaluator
-        self._parser_module = parser_module
         self._namespaces = namespaces
 
-    def names_dicts(self):
-        for names_dict in self._parser_module.names_dicts():
+        self._namespace_objects = [type('jedi_namespace', (), n) for n in namespaces]
+        self._wrapped_module = ModuleWrapper(evaluator, parser_module)
+        # Usually we are dealing with very small code sizes when it comes to
+        # interpreter modules. In this case we just copy the whole syntax tree
+        # to be able to modify it.
+        self._parser_module = helpers.deep_ast_copy(parser_module)
+
+        for child in self._parser_module.children:
+            child.parent = self
+
+    def names_dicts(self, search_global):
+        for names_dict in self._wrapped_module.names_dicts(search_global):
             yield names_dict
 
-        for namespace in self._namespaces:
-            print('ole')
-            yield mixed.MixedObject(self._evaluator, namespace, self._parser_module.name)
+        for namespace_obj in self._namespace_objects:
+            m = mixed.MixedObject(self._evaluator, namespace_obj, self._parser_module.name)
+            for names_dict in m.names_dicts(False):
+                yield names_dict
 
-        yield namespace
+    def __getattr__(self, name):
+        return getattr(self._parser_module, name)
 
 
 class LazyName(helpers.FakeName):
@@ -125,7 +126,7 @@ class LazyName(helpers.FakeName):
                                               'should be part of sys.modules.')
 
                 if parser_path:
-                    #assert len(parser_path) == 1
+                    assert len(parser_path) == 1
                     found = list(self._evaluator.find_types(mod, parser_path[0],
                                                             search_global=True))
                 else:
diff --git a/jedi/evaluate/compiled/__init__.py b/jedi/evaluate/compiled/__init__.py
index 113d88e6..a4187cf6 100644
--- a/jedi/evaluate/compiled/__init__.py
+++ b/jedi/evaluate/compiled/__init__.py
@@ -115,6 +115,7 @@ class CompiledObject(Base):
         elif inspect.isbuiltin(cls) or inspect.ismethod(cls) \
                 or inspect.ismethoddescriptor(cls) or inspect.isfunction(cls):
             return 'function'
+        raise NotImplementedError
 
     @property
     def type(self):
diff --git a/jedi/evaluate/compiled/mixed.py b/jedi/evaluate/compiled/mixed.py
index a7b4d419..24e4e731 100644
--- a/jedi/evaluate/compiled/mixed.py
+++ b/jedi/evaluate/compiled/mixed.py
@@ -7,8 +7,7 @@ import inspect
 from jedi import common
 from jedi.parser.fast import FastParser
 from jedi.evaluate import compiled
-from jedi.cache import underscore_memoization, memoize_method
-from jedi.evaluate.cache import memoize_default
+from jedi.cache import underscore_memoization
 
 
 class MixedObject(object):
@@ -38,6 +37,15 @@ class MixedObject(object):
         assert search_global is False
         return [LazyMixedNamesDict(self._evaluator, self, is_instance=False)]
 
+    def api_type(self):
+        mappings = {
+            'expr_stmt': 'statement',
+            'classdef': 'class',
+            'funcdef': 'function',
+            'file_input': 'module',
+        }
+        return mappings[self._definition.type]
+
     def __repr__(self):
         return '<%s: %s>' % (type(self).__name__, repr(self.obj))
 
diff --git a/jedi/evaluate/finder.py b/jedi/evaluate/finder.py
index d3b8062a..0ded2dfa 100644
--- a/jedi/evaluate/finder.py
+++ b/jedi/evaluate/finder.py
@@ -559,6 +559,8 @@ def global_names_dict_generator(evaluator, scope, position):
 
             for names_dict in scope.names_dicts(True):
                 yield names_dict, position
+                if hasattr(scope, 'resets_positions'):
+                    position = None
             if scope.type == 'funcdef':
                 # The position should be reset if the current scope is a function.
                 in_func = True
diff --git a/test/test_api/test_interpreter.py b/test/test_api/test_interpreter.py
index 7b744d22..ae98e81c 100644
--- a/test/test_api/test_interpreter.py
+++ b/test/test_api/test_interpreter.py
@@ -34,6 +34,7 @@ def test_builtin_details():
     var = get_completion('variable', locals())
     f = get_completion('func', locals())
     m = get_completion('keyword', locals())
+    print(cls._definition.type)
     assert cls.type == 'class'
     assert var.type == 'instance'
     assert f.type == 'function'