[BUG] AttributeError: 'DefaultForecasterConfig' object has no attribute 'invert_transform'

[bkowshik]

Describe the bug

fig, ax = model.plot_forecast(time_series=dataset_test, plot_forecast_uncertainty=True)

---------------------------------------------------------------------------
AttributeError                            Traceback (most recent call last)
<ipython-input-49-a413bfb44d12> in <module>
----> 1 fig, ax = model.plot_forecast(time_series=dataset_test, plot_forecast_uncertainty=True)

/usr/local/lib/python3.7/site-packages/merlion/models/forecast/base.py in plot_forecast(self, time_series, time_stamps, time_series_prev, plot_forecast_uncertainty, plot_time_series_prev, figsize, ax)
    498             time_series_prev=time_series_prev,
    499             plot_forecast_uncertainty=plot_forecast_uncertainty,
--> 500             plot_time_series_prev=plot_time_series_prev,
    501         )
    502         title = f"{type(self).__name__}: Forecast of {self.target_name}"

/usr/local/lib/python3.7/site-packages/merlion/models/forecast/base.py in get_figure(self, time_series, time_stamps, time_series_prev, plot_forecast_uncertainty, plot_time_series_prev)
    400         ), "Must provide at least one of time_series or time_stamps"
    401         if time_stamps is None:
--> 402             if self.invert_transform:
    403                 time_stamps = time_series.time_stamps
    404                 y = time_series.univariates[time_series.names[self.target_seq_index]]

/usr/local/lib/python3.7/site-packages/merlion/models/layers.py in __getattr__(self, item)
    271         if callable(attr):
    272             return attr
--> 273         return self.__getattribute__(item)
    274 
    275     def train(self, train_data: TimeSeries, *args, **kwargs):

/usr/local/lib/python3.7/site-packages/merlion/models/forecast/base.py in invert_transform(self)
     88         :return: Whether to automatically invert the ``transform`` before returning a forecast.
     89         """
---> 90         return self.config.invert_transform
     91 
     92     @property

/usr/local/lib/python3.7/site-packages/merlion/models/layers.py in __getattr__(self, item)
    113         elif base_model is None and item in self.model_kwargs:
    114             return self.model_kwargs.get(item)
--> 115         return self.__getattribute__(item)
    116 
    117     def __setattr__(self, key, value):

AttributeError: 'DefaultForecasterConfig' object has no attribute 'invert_transform'

To Reproduce
Notebook using a different dataset https://github.com/salesforce/Merlion/blob/main/examples/forecast/0_ForecastIntro.ipynb

Expected behavior
Visualization of the actual and forecasted values.

Desktop (please complete the following information):

• OS: macOS Big Sur
• Merlion version: 1.2.0

[SinclairGurny]

Having this error as well

[aadyotb]

This is related to #101. Thanks for highlighting the issue.

[aadyotb]

Fixed in #104.