Update utils.py

utils.py

@@ -3,7 +3,7 @@ import json
 from typing import Any, Dict
 
 def to_jsonable(obj: Any) -> Any:
-    """Safely convert pandas/numpy objects to JSON-able python types. """
+    """Safely convert pandas/numpy objects to JSON-able python types."""
     try:
         import numpy as np
         import pandas as pd
@@ -19,15 +19,14 @@ def to_jsonable(obj: Any) -> Any:
         return int(obj)
     if np is not None and isinstance(obj, (np.floating,)):
         f = float(obj)
-        # JSON NaNを避ける
-        if f !=f:
+        if f != f:  # NaN
             return None
         return f
     if isinstance(obj, (set,)):
         return list(obj)
-    if isinstance(obj,(bytes, bytearray)):
+    if isinstance(obj, (bytes, bytearray)):
         return obj.decode("utf-8", errors="ignore")
     return obj
 
 def dumps(d: Dict[str, Any]) -> str:
-    return json.dumps(d, ensure_ascii=False, default=to_jsonable)
+    return json.dumps(d, ensure_ascii=False, default=to_jsonable)