3.7 fixes

Author: cretz

temporalio/converter.py

@@ -19,9 +19,7 @@
     Dict,
     Iterable,
     List,
-    Literal,
     Mapping,
-    NewType,
     Optional,
     Tuple,
     Type,
@@ -32,6 +30,7 @@
 import google.protobuf.json_format
 import google.protobuf.message
 import google.protobuf.symbol_database
+from typing_extensions import Literal
 
 import temporalio.api.common.v1
 import temporalio.common
@@ -845,9 +844,12 @@ def value_to_type(hint: Type, value: Any) -> Any:
             raise TypeError(f"Expected None, got value of type {type(value)}")
         return None
 
-    # NewType
-    if isinstance(hint, NewType):
-        return value_to_type(hint.__supertype__, value)
+    # NewType. Note we cannot simply check isinstance NewType here because it's
+    # only been a class since 3.10. Instead we'll just check for the presence
+    # of a supertype.
+    supertype = getattr(hint, "__supertype__", None)
+    if supertype:
+        return value_to_type(supertype, value)
 
     # Load origin for other checks
     origin = getattr(hint, "__origin__", hint)

tests/test_converter.py

@@ -12,7 +12,6 @@
     Dict,
     Iterable,
     List,
-    Literal,
     Mapping,
     MutableMapping,
     NewType,
@@ -27,7 +26,7 @@
 
 import pydantic
 import pytest
-from typing_extensions import TypedDict
+from typing_extensions import Literal, TypedDict
 
 import temporalio.api.common.v1
 import temporalio.common