Refactor Evaluator.wrap to use the types in a more consequent way.

jedi/api/interpreter.py

@@ -4,6 +4,7 @@ TODO Some parts of this module are still not well documented.
 import inspect
 import re
 import sys
+import copy
 
 from jedi._compatibility import builtins
 from jedi import debug
@@ -31,7 +32,7 @@ class MixedModule(object):
         # 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)
+        self._parser_module = copy.deepcopy(parser_module)
 
         for child in self._parser_module.children:
             child.parent = self

jedi/api/keywords.py

@@ -67,6 +67,8 @@ keywords_only_valid_as_leaf = (
 
 
 class Keyword(object):
+    type = 'completion_keyword'
+
     def __init__(self, evaluator, name, pos):
         self.name = FakeName(name, self, pos)
         self.start_pos = pos