kats/models/nowcasting/dynamic_nowcasting.py [289:320]:
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            y_predict = self.model.predict(X_test)
            poly_now = self.y_train_season_obj[-1]
            first_occ = np.where(self.y_train_season_obj == poly_now)
            polynext = self.y_train_season_obj[first_occ[0][0] + self.step]
            now = self.df["y"][-self.step :]
            # print(y_predict)
            return (now - poly_now) - y_predict + polynext

    def predict_polyfit(self, model=None, df=None, **kwargs):
        poly_now = self.y_train_season_obj[-1]
        first_occ = np.where(self.y_train_season_obj == poly_now)
        polynext = self.y_train_season_obj[first_occ[0][0] + self.step]
        return polynext

    def load_model(self, model_as_bytes: bytes) -> None:
        """Loads model_as_str and decodes into the class NowcastingModel.

        Args:
            model_as_bytes: a binary variable, indicating whether to read as bytes.
        """

        self.model = deserialize_from_zippy(model_as_bytes)

    def plot(self):
        """Raises: NotImplementedError("Subclasses should implement this!")。"""

        raise NotImplementedError("Subclasses should implement this!")

    def __str__(self):
        """Returns the name as Nowcasting,"""

        return "Nowcasting"
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kats/models/nowcasting/nowcastingplus.py [227:257]:
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        y_predict = self.model.predict(X_test)
        poly_now = self.y_train_season_obj[-1]
        first_occ = np.where(self.y_train_season_obj == poly_now)
        polynext = self.y_train_season_obj[first_occ[0][0] + self.step]
        now = self.df["y"][-self.step :]
        return (now - poly_now) - y_predict + polynext

    def predict_polyfit(self, model=None, df=None, **kwargs):
        poly_now = self.y_train_season_obj[-1]
        first_occ = np.where(self.y_train_season_obj == poly_now)
        polynext = self.y_train_season_obj[first_occ[0][0] + self.step]
        return polynext

    def load_model(self, model_as_bytes: bytes) -> None:
        """Loads model_as_str and decodes into the class NowcastingModel.

        Args:
            model_as_bytes: a binary variable, indicating whether to read as bytes.
        """

        self.model = deserialize_from_zippy(model_as_bytes)

    def plot(self):
        """Raises: NotImplementedError("Subclasses should implement this!")。"""

        raise NotImplementedError("Subclasses should implement this!")

    def __str__(self):
        """Returns the name as Nowcasting,"""

        return "Nowcasting"
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