Cannot create `VortexTrack` from it's output dataframe

[Soroosh Mani]

A standardized dataframe can be obtained by calling .fort_22() for .atcf() of a VortexTrack object. If we pass this obtained Dataframe back as storm to create a new VotexTrack, it fails, because it expects a datetime object for the column with the same name.

In [1]: storm = stormevents.StormEvent('Florence', 2018)
In [2]: track = storm.track()
In [3]: new_track = stormevents.nhc.track.VortexTrack(storm=track.atcf())
---------------------------------------------------------------------------
AttributeError                            Traceback (most recent call last)
Cell In [3], line 1
----> 1 new_track = stormevents.nhc.track.VortexTrack(storm=track.atcf())

File ~/miniconda3/envs/ensemble/lib/python3.9/site-packages/stormevents/nhc/track.py:100, in VortexTrack.__init__(self, storm, start_date, end_date, file_deck, advisories)
     97 self.advisories = advisories
     98 self.file_deck = file_deck
--> 100 self.__previous_configuration = self.__configuration
    102 # use start and end dates to mask dataframe here
    103 self.start_date = start_date

File ~/miniconda3/envs/ensemble/lib/python3.9/site-packages/stormevents/nhc/track.py:997, in VortexTrack.__configuration(self)
    994 @property
    995 def __configuration(self) -> Dict[str, Any]:
    996     return {
--> 997         'id': self.nhc_code,
    998         'file_deck': self.file_deck,
    999         'advisories': self.advisories,
   1000         'filename': self.filename,
   1001     }

File ~/miniconda3/envs/ensemble/lib/python3.9/site-packages/stormevents/nhc/track.py:240, in VortexTrack.nhc_code(self)
    235 if self.__nhc_code is None and not self.__invalid_storm_name:
    236     if self.__unfiltered_data is not None:
    237         nhc_code = (
    238             f'{self.__unfiltered_data["basin"].iloc[-1]}'
    239             f'{self.__unfiltered_data["storm_number"].iloc[-1]}'
--> 240             f'{self.__unfiltered_data["datetime"].iloc[-1].year}'
    241         )
    242         try:
    243             self.nhc_code = nhc_code

AttributeError: 'str' object has no attribute 'year'

The usecase for doing this is to get the storm track, then modify its data (e.g. perturb half of it, but not the other half then concatenate the two halves) and then create a new VortexTrack from the modified data.

In my specific use case, I perturbed part of the tracks using EnsemblePerturbation and needed to concatenate it with the rest of the track that was not perturbed. So I read-in the perturbed *.22 files into a VortexTrack using .from_file(...) and realized my perturbed_segment_track.data is different in format from the original_segment_track.data and in order to concatenate them I used .fort_22() to standardize both of them to the same thing! But then I could not create a new VortexTrack from the concatenated dataframes