add typehint Any to Undefined object
@@ -4,6 +4,7 @@ import collections
import contextlib
import inspect
import json
+from typing import Any
import jsonschema
import numpy as np
@@ -137,7 +138,7 @@ class UndefinedType(object):
return "Undefined"
-Undefined = UndefinedType()
+Undefined: Any = UndefinedType()
class SchemaBase(object):
