Move is_scope and get_parent_scope out of the parser.

jedi/evaluate/helpers.py

@@ -3,6 +3,7 @@ from itertools import chain
 from contextlib import contextmanager
 
 from jedi.parser.python import tree
+from jedi.parser_utils import get_parent_scope
 
 
 def deep_ast_copy(obj):
@@ -143,7 +144,7 @@ def get_module_names(module, all_scopes):
         # parent_scope. There's None as a parent, because nodes in the module
         # node have the parent module and not suite as all the others.
         # Therefore it's important to catch that case.
-        names = [n for n in names if n.get_parent_scope().parent in (module, None)]
+        names = [n for n in names if get_parent_scope(n).parent in (module, None)]
     return names