data.py 文件源码

def _decode_ds(cls, ds, gridfile=None, inplace=False, decode_coords=True,
                   decode_times=True):
        """
        Static method to decode coordinates and time informations

        This method interpretes absolute time informations (stored with units
        ``'day as %Y%m%d.%f'``) and coordinates

        Parameters
        ----------
        %(CFDecoder.decode_coords.parameters)s
        decode_times : bool, optional
            If True, decode times encoded in the standard NetCDF datetime
            format into datetime objects. Otherwise, leave them encoded as
            numbers.
        decode_coords : bool, optional
            If True, decode the 'coordinates' attribute to identify coordinates
            in the resulting dataset."""
        if decode_coords:
            ds = cls.decode_coords(ds, gridfile=gridfile,
                                   inplace=inplace)
        if decode_times:
            for k, v in six.iteritems(ds.variables):
                # check for absolute time units and make sure the data is not
                # already decoded via dtype check
                if v.attrs.get('units', '') == 'day as %Y%m%d.%f' and (
                        np.issubdtype(v.dtype, float)):
                    decoded = xr.Variable(
                        v.dims, AbsoluteTimeDecoder(v), attrs=v.attrs,
                        encoding=v.encoding)
                    ds = ds.update({k: decoded}, inplace=inplace)
        return ds