import logging from typing import Any from pandas import DataFrame from freqtrade.freqai.data_kitchen import FreqaiDataKitchen from freqtrade.freqai.freqai_interface import IFreqaiModel logger = logging.getLogger(__name__) class BaseTensorFlowModel(IFreqaiModel): """ Base class for TensorFlow type models. User *must* inherit from this class and set fit() and predict(). """ def train( self, unfiltered_dataframe: DataFrame, pair: str, dk: FreqaiDataKitchen ) -> Any: """ Filter the training data and train a model to it. Train makes heavy use of the datakitchen for storing, saving, loading, and analyzing the data. :param unfiltered_dataframe: Full dataframe for the current training period :param metadata: pair metadata from strategy. :returns: :model: Trained model which can be used to inference (self.predict) """ logger.info("--------------------Starting training " f"{pair} --------------------") # filter the features requested by user in the configuration file and elegantly handle NaNs features_filtered, labels_filtered = dk.filter_features( unfiltered_dataframe, dk.training_features_list, dk.label_list, training_filter=True, ) # split data into train/test data. data_dictionary = dk.make_train_test_datasets(features_filtered, labels_filtered) # normalize all data based on train_dataset only data_dictionary = dk.normalize_data(data_dictionary) # optional additional data cleaning/analysis self.data_cleaning_train(dk) logger.info( f'Training model on {len(dk.data_dictionary["train_features"].columns)}' " features" ) logger.info(f'Training model on {len(data_dictionary["train_features"])} data points') model = self.fit(data_dictionary) if pair not in self.dd.historic_predictions: self.set_initial_historic_predictions( data_dictionary['train_features'], model, dk, pair) if self.freqai_info.get('fit_live_predictions_candles', 0) and self.live: self.fit_live_predictions(dk) else: dk.fit_labels() self.dd.save_historic_predictions_to_disk() logger.info(f"--------------------done training {pair}--------------------") return model