Adjust rolling api (#1594)

* Intermediate version

* Fix yaml template & Successfully run rolling

* Be compatible with benchmark

* Get same results with previous linear model

* Black formatting

* Update black

* Update the placeholder mechanism

* Update CI

* Update CI

* Upgrade Black

* Fix CI and simplify code

* Fix CI

* Move the data processing caching mechanism into utils.

* Adjusting DDG-DA

* Organize import

examples/benchmarks/TFT/data_formatters/base.py

@@ -139,7 +139,6 @@ class GenericDataFormatter(abc.ABC):
         # Sanity checks first.
         # Ensure only one ID and time column exist
         def _check_single_column(input_type):
-
             length = len([tup for tup in column_definition if tup[2] == input_type])
 
             if length != 1:

examples/benchmarks/TFT/expt_settings/configs.py

@@ -78,7 +78,6 @@ class ExperimentConfig:
 
     @property
     def hyperparam_iterations(self):
-
         return 240 if self.experiment == "volatility" else 60
 
     def make_data_formatter(self):

examples/benchmarks/TFT/libs/hyperparam_opt.py

@@ -88,7 +88,6 @@ class HyperparamOptManager:
         params_file = os.path.join(self.hyperparam_folder, "params.csv")
 
         if os.path.exists(results_file) and os.path.exists(params_file):
-
             self.results = pd.read_csv(results_file, index_col=0)
             self.saved_params = pd.read_csv(params_file, index_col=0)
 
@@ -178,7 +177,6 @@ class HyperparamOptManager:
             return parameters
 
         for _ in range(self._max_tries):
-
             parameters = _get_next()
             name = self._get_name(parameters)
 

examples/benchmarks/TFT/libs/tft_model.py

@@ -475,7 +475,6 @@ class TemporalFusionTransformer:
 
         embeddings = []
         for i in range(num_categorical_variables):
-
             embedding = tf.keras.Sequential(
                 [
                     tf.keras.layers.InputLayer([time_steps]),
@@ -680,7 +679,6 @@ class TemporalFusionTransformer:
 
         data_map = {}
         for _, sliced in data.groupby(id_col):
-
             col_mappings = {"identifier": [id_col], "time": [time_col], "outputs": [target_col], "inputs": input_cols}
 
             for k in col_mappings:
@@ -954,7 +952,6 @@ class TemporalFusionTransformer:
         """
 
         with tf.variable_scope(self.name):
-
             transformer_layer, all_inputs, attention_components = self._build_base_graph()
 
             outputs = tf.keras.layers.TimeDistributed(tf.keras.layers.Dense(self.output_size * len(self.quantiles)))(

examples/benchmarks/TFT/workflow_config_tft_Alpha158.yaml

@@ -16,9 +16,7 @@ port_analysis_config: &port_analysis_config
         class: TopkDropoutStrategy
         module_path: qlib.contrib.strategy
         kwargs:
-            signal:
-                - <MODEL> 
-                - <DATASET>
+            signal: <PRED>
             topk: 50
             n_drop: 5
     backtest: