Update timefeatures.py

utils/timefeatures.py

@@ -30,7 +30,7 @@ class MinuteOfHour(TimeFeature):
 
 class HourOfDay(TimeFeature):
     """Hour of day encoded as value between [-0.5, 0.5]"""
-    def __call__(self, index: pd.DatetimeIndex) -> np.ndarray:
+    def __call__(self, index: pd.DatetimeIndex) -> mnp.ndarray:
         return index.hour / 23.0 - 0.5
 
 class DayOfWeek(TimeFeature):