started writing a new interpreter module that is heavily simplified and fits the current Jedi architecture way better.

jedi/api/__init__.py

@@ -21,9 +21,9 @@ from jedi import debug
 from jedi import settings
 from jedi import common
 from jedi import cache
-from jedi import interpret
 from jedi.api import keywords
 from jedi.api import classes
+from jedi.api import interpreter
 from jedi.evaluate import Evaluator, filter_private_variable
 from jedi.evaluate import representation as er
 from jedi.evaluate import compiled
@@ -150,8 +150,7 @@ class Script(object):
             if settings.case_insensitive_completion \
                     and n.lower().startswith(like.lower()) \
                     or n.startswith(like):
-                if not filter_private_variable(s,
-                            user_stmt or self._parser.user_scope(), n):
+                if not filter_private_variable(s, user_stmt or self._parser.user_scope(), n):
                     new = classes.Completion(self._evaluator, c, needs_dot, len(like), s)
                     k = (new.name, new.complete)  # key
                     if k in comp_dct and settings.no_completion_duplicates:
@@ -548,7 +547,6 @@ class Script(object):
 
 
 class Interpreter(Script):
-
     """
     Jedi API for Python REPLs.
 
@@ -562,7 +560,6 @@ class Interpreter(Script):
     >>> script = Interpreter('join().up', [namespace])
     >>> print(script.completions()[0].name)
     upper
-
     """
 
     def __init__(self, source, namespaces=[], **kwds):
@@ -583,9 +580,7 @@ class Interpreter(Script):
         self.namespaces = namespaces
 
         # Here we add the namespaces to the current parser.
-        importer = interpret.ObjectImporter(self._parser.user_scope())
-        for ns in namespaces:
-            importer.import_raw_namespace(ns)
+        interpreter.create(namespaces[0], self._parser.module())
 
     def _simple_complete(self, path, like):
         user_stmt = self._parser.user_stmt(True)

jedi/api/interpreter.py

@@ -0,0 +1,35 @@
+from jedi.evaluate import compiled
+from jedi.parser import representation as pr
+from jedi.evaluate import helpers
+
+
+class InterpreterNamespace(pr.Module):
+    def __init__(self, namespace, parser_module):
+        self.namespace = namespace
+        self.parser_module = parser_module
+
+    def get_defined_names(self):
+        for key, value in self.namespace.items():
+            yield LazyName(key, value)
+
+    def __getattr__(self, name):
+        return getattr(self.parser_module, name)
+
+
+class LazyName(helpers.FakeName):
+    def __init__(self, name, parent_obj):
+        super(LazyName, self).__init__(name)
+        self._parent_obj = parent_obj
+
+    @property
+    def parent(self):
+        return compiled.create(self._parent_obj)
+
+    @parent.setter
+    def parent(self, value):
+        """Needed because of the ``representation.Simple`` super class."""
+
+
+def create(namespace, parser_module):
+    ns = InterpreterNamespace(namespace, parser_module)
+    parser_module.statements[0].parent = ns

jedi/evaluate/compiled/__init__.py

@@ -290,7 +290,7 @@ def create(obj, parent=builtin, module=None):
     A very weird interface class to this module. The more options provided the
     more acurate loading compiled objects is.
     """
-    if not inspect.ismodule(parent):
+    if not inspect.ismodule(obj):
         faked = fake.get_faked(module and module.obj, obj)
         if faked is not None:
             faked.parent = parent