parse class bases like function arguments

Author: maxfischer2781

python/extractor/tsg-python/python.tsg

@@ -1286,11 +1286,15 @@
 ; In particular, `keyword_argument` nodes have a `name` field, and `dictionary_splat`
 ; nodes have a `value` field.
 (class_definition
-    superclasses: (argument_list element: (_ !value !name) @arg)
+    superclasses: (argument_list element: (_) @arg)
 ) @class
 {
-    edge @class.class_expr -> @arg.node
-    attr (@class.class_expr -> @arg.node) bases = (named-child-index @arg)
+    if (not (or
+            (instance-of @arg "keyword_argument")
+            (instance-of @arg "dictionary_splat"))) {
+        edge @class.class_expr -> @arg.node
+        attr (@class.class_expr -> @arg.node) bases = (named-child-index @arg)
+    }
 }
 
 ; Class.keywords of the form `foo=bar`