class_docstr: File handler for SMOS L2 wind netCDF files.
class_docstr_tok: ["File","handler","for","SMOS","L2","wind","netCDF","files","."]
docstr: Mask out fill values.
docstr_tok: ["Mask","out","fill","values","."]
code: def _mask_dataset(self, data):
      """Mask out fill values."""
      try:
          fill = data.attrs["_FillValue"]
          data.attrs["_FillValue"] = np.nan
          return data.where(data != fill)
      except KeyError:
          return data
  
imports: import logging
  from datetime import datetime
  import numpy
  from pyresample.geometry import AreaDefinition
  from satpy.readers.netcdf_utils import NetCDF4FileHandler, netCDF4
label_desc: Use image node_id 7 for calling the SMOSL2WINDFileHandler obj's underlying member method code with example usage: obj._mask_dataset(data) and returns: data, data