db: phenotypes: Add type for Dataclass

See: https://www.py4u.net/discuss/188952

1 files changed, 8 insertions, 1 deletions

diff --git a/gn3/db/phenotypes.py b/gn3/db/phenotypes.py
index be5fb7b..e97322a 100644
--- a/gn3/db/phenotypes.py
+++ b/gn3/db/phenotypes.py
@@ -3,9 +3,16 @@
 the db"""
 from dataclasses import dataclass, asdict, astuple
 
-from typing import Any, Optional
+from typing import Any, Dict, Optional
 from MySQLdb import escape_string
 
+from typing_extensions import Protocol
+
+
+class Dataclass(Protocol):
+    """Type Definition for a Dataclass"""
+    __dataclass_fields__: Dict
+
 
 @dataclass(frozen=True)
 class Phenotype: