fixed nc topo exo handler which needs to have same init args and kwar…

…gs for signature parsing

sup3r/preprocessing/data_handling/exo_extraction.py

@@ -148,6 +148,9 @@ def __init__(self,
  self.shape = shape
  self.res_kwargs = res_kwargs
 
+ # for subclasses
+ self._source_handler = None
+
  if input_handler is None:
  in_type = get_source_type(file_paths)
  if in_type == 'nc':
@@ -566,23 +569,20 @@ def get_cache_file(self, feature, s_enhance, t_enhance, t_agg_factor):
 class TopoExtractNC(TopoExtractH5):
  """TopoExtract for netCDF files"""
 
- def __init__(self, *args, **kwargs):
- """Parameters
- ----------
- args : list
- Same positional arguments as TopoExtract
- kwargs : dict
- Same keyword arguments as TopoExtract
- """
- super().__init__(*args, **kwargs)
- logger.info('Getting topography for full domain from '
- f'{self._exo_source}')
- self.source_handler = DataHandlerNC(
- self._exo_source,
- features=['topography'],
- worker_kwargs={'ti_workers': self.ti_workers},
- val_split=0.0,
- )
+ @property
+ def source_handler(self):
+ """Get the DataHandlerNC object that handles the .nc source topography
+ data file."""
+ if self._source_handler is None:
+ logger.info('Getting topography for full domain from '
+ f'{self._exo_source}')
+ self._source_handler = DataHandlerNC(
+ self._exo_source,
+ features=['topography'],
+ worker_kwargs={'ti_workers': self.ti_workers},
+ val_split=0.0,
+ )
+ return self._source_handler
 
  @property
  def source_data(self):