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utils.py

@@ -1,4 +1,3 @@
-from queue import Queue
 from typing import Any, Dict
 
 
@@ -7,11 +6,13 @@ class Singleton(type):
 
     def __call__(cls, *args, **kwargs):
         if cls not in cls._instances:
-            cls._instances[cls] = super(Singleton, cls).__call__(*args, **kwargs)
+            cls._instances[cls] = super().__call__(*args, **kwargs)
         return cls._instances[cls]
 
 
-def flatten_dict(d: Dict[str, Any], parent_key: str = "", sep: str = "_") -> Dict[str, Any]:
+def flatten_dict(
+    d: Dict[str, Any], parent_key: str = "", sep: str = "_"
+) -> Dict[str, Any]:
     items = []
     for k, v in d.items():
         new_key = parent_key + sep + k if parent_key else k