[pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

Author: pre-commit-ci[bot]

machine_learning/loss_functions.py

@@ -662,6 +662,7 @@ def kullback_leibler_divergence(y_true: np.ndarray, y_pred: np.ndarray) -> float
     kl_loss = y_true * np.log(y_true / y_pred)
     return np.sum(kl_loss)
 
+
 def root_mean_squared_error(y_true: np.array, y_pred: np.array) -> float:
     """
     Root Mean Squared Error (RMSE)
@@ -697,6 +698,7 @@ def root_mean_squared_error(y_true: np.array, y_pred: np.array) -> float:
     mse = np.mean((y_pred - y_true) ** 2)
     return np.sqrt(mse)
 
+
 if __name__ == "__main__":
     import doctest