diff --git a/kasa/modules/emeter.py b/kasa/modules/emeter.py
index a205396e..11eed48f 100644
--- a/kasa/modules/emeter.py
+++ b/kasa/modules/emeter.py
@@ -63,7 +63,7 @@ class Emeter(Usage):
         self,
         data: List[Dict[str, Union[int, float]]],
         entry_key: str,
-        kwh: bool=True,
+        kwh: bool = True,
         key: Optional[int] = None,
     ) -> Dict[Union[int, float], Union[int, float]]:
         """Return emeter information keyed with the day/month.