Refactor Jedi so we use stub modules as much as possible

jedi/evaluate/context/klass.py

@@ -200,12 +200,7 @@ class ClassMixin(FunctionAndClassMixin):
             from jedi.evaluate.compiled import builtin_from_name
             type_ = builtin_from_name(self.evaluator, u'type')
             if type_ != self:
-                # Return completions of the meta class.
-                yield ClassFilter(
-                    self.evaluator, self, node_context=type_,
-                    origin_scope=origin_scope,
-                    is_instance=is_instance
-                )
+                yield next(type_.get_filters())
 
 
 class ClassContext(use_metaclass(CachedMetaClass, ClassMixin, TreeContext)):

jedi/evaluate/context/module.py

@@ -53,7 +53,7 @@ class SubModuleDictMixin(object):
             pass
         else:
             for path in method():
-                mods = iter_modules([path])
+                mods = self._iter_modules(path)
                 for module_loader, name, is_pkg in mods:
                     # It's obviously a relative import to the current module.
                     names[name] = SubModuleName(self, name)
@@ -67,6 +67,9 @@ class SubModuleDictMixin(object):
 
         return names
 
+    def _iter_modules(self, path):
+        return iter_modules([path])
+
 
 class ModuleMixin(SubModuleDictMixin):
     def get_filters(self, search_global=False, until_position=None, origin_scope=None):