[style] Use is to compare types (#2317)

fixcore/fixcore/model/typed_model.py

@@ -25,7 +25,7 @@ def type_fqn(tpe: type) -> str:
 
 
 def from_js(json: JsonElement, clazz: Type[AnyT]) -> AnyT:
-    return jsons.load(json, cls=clazz) if clazz != dict else json  # type: ignore
+    return jsons.load(json, cls=clazz) if clazz is not dict else json  # type: ignore
 
 
 def to_js(node: Any, **kwargs: Any) -> Json:

fixlib/test/core/model_export_test.py

@@ -83,8 +83,8 @@ def test_collection() -> None:
     assert is_collection(list) is True
     assert is_collection(dict) is False
 
-    assert type_arg(Optional[List[int]]) == int
-    assert type_arg(List[datetime]) == datetime
+    assert type_arg(Optional[List[int]]) is int
+    assert type_arg(List[datetime]) is datetime
 
 
 def test_dictionary() -> None:

plugins/azure/tools/azure_model_gen.py

@@ -539,7 +539,7 @@ def fill_sequence(seq, index, value_index_type):
         while len(seq) < index:
             seq.append(None)
 
-        if value_index_type == int:
+        if value_index_type is int:
             seq.append([])
         elif value_index_type is None:
             seq.append(None)