1 files changed, 6 insertions, 1 deletions
diff --git a/openbb_platform/core/openbb_core/app/model/abstract/singleton.py b/openbb_platform/core/openbb_core/app/model/abstract/singleton.py
index 7d6bad71a1b..0ecccafc446 100644
--- a/openbb_platform/core/openbb_core/app/model/abstract/singleton.py
+++ b/openbb_platform/core/openbb_core/app/model/abstract/singleton.py
@@ -1,13 +1,18 @@
+"""Singleton metaclass implementation."""
+
 from typing import Dict, Generic, TypeVar
 
 T = TypeVar("T")
 
 
 class SingletonMeta(type, Generic[T]):
+    """Singleton metaclass."""
+
     # TODO : check if we want to update this to be thread safe
     _instances: Dict[T, T] = {}
 
-    def __call__(cls, *args, **kwargs):
+    def __call__(cls: "SingletonMeta", *args, **kwargs):
+        """Singleton pattern implementation."""
         if cls not in cls._instances:
             instance = super().__call__(*args, **kwargs)
             cls._instances[cls] = instance