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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def setup(self, ds):
 """ Initialize various special variable types within the class. Mutates a number of instance variables. :param netCDF4.Dataset ds: An open netCDF dataset """

        self._find_coord_vars(ds)
        self._find_aux_coord_vars(ds)
        self._find_ancillary_vars(ds)
        self._find_clim_vars(ds)
        self._find_boundary_vars(ds)
        self._find_metadata_vars(ds)
        self._find_cf_standard_name_table(ds)
        self._find_geophysical_vars(ds)