black format

qlib/data/ops.py

@@ -1385,6 +1385,7 @@ class Cov(PairRolling):
     def __init__(self, feature_left, feature_right, N):
         super(Cov, self).__init__(feature_left, feature_right, N, "cov")
 
+
 Operators = OpsWrapper()
 
 OpsList = [

qlib/utils/__init__.py

@@ -729,13 +729,16 @@ def load_dataset(path_or_obj):
         return pd.read_csv(path_or_obj, parse_dates=True, index_col=[0, 1])
     raise ValueError(f"unsupported file type `{extension}`")
 
+
 #################### Operator Wrapper #####################
 
+
 class OpsWrapper(object):
     """Ops Wrapper"""
 
     def __init__(self):
         self._ops = {}
+
     def register(self, ops_list):
 
         for operator in ops_list: