add USERPATH_FREQAIMODELS, remove return values from @abstract methods

freqtrade/constants.py

@@ -55,6 +55,7 @@ FTHYPT_FILEVERSION = 'fthypt_fileversion'
 USERPATH_HYPEROPTS = 'hyperopts'
 USERPATH_STRATEGIES = 'strategies'
 USERPATH_NOTEBOOKS = 'notebooks'
+USERPATH_FREQAIMODELS = 'freqaimodels'
 
 TELEGRAM_SETTING_OPTIONS = ['on', 'off', 'silent']
 WEBHOOK_FORMAT_OPTIONS = ['form', 'json', 'raw']

freqtrade/freqai/freqai_interface.py

@@ -110,8 +110,6 @@ class IFreqaiModel(ABC):
         :model: Trained model which can be used to inference (self.predict)
         """
 
-        return Any
-
     @abstractmethod
     def fit(self) -> Any:
         """
@@ -123,8 +121,6 @@ class IFreqaiModel(ABC):
         all the training and test data/labels.
         """
 
-        return Any
-
     @abstractmethod
     def predict(self, dataframe: DataFrame) -> Tuple[np.array, np.array]:
         """
@@ -136,8 +132,6 @@ class IFreqaiModel(ABC):
         data (NaNs) or felt uncertain about data (PCA and DI index)
         """
 
-        return np.array([]), np.array([])
-
     def model_exists(self, pair: str, training_timerange: str) -> bool:
         """
         Given a pair and path, check if a model already exists