data.py 文件源码

def to_netcdf(ds, *args, **kwargs):
    """
    Store the given dataset as a netCDF file

    This functions works essentially the same as the usual
    :meth:`xarray.Dataset.to_netcdf` method but can also encode absolute time
    units

    Parameters
    ----------
    ds: xarray.Dataset
        The dataset to store
    %(xarray.Dataset.to_netcdf.parameters)s
    """
    to_update = {}
    for v, obj in six.iteritems(ds.variables):
        units = obj.attrs.get('units', obj.encoding.get('units', None))
        if units == 'day as %Y%m%d.%f' and np.issubdtype(
                obj.dtype, np.datetime64):
            to_update[v] = xr.Variable(
                obj.dims, AbsoluteTimeEncoder(obj), attrs=obj.attrs.copy(),
                encoding=obj.encoding)
            to_update[v].attrs['units'] = units
    if to_update:
        ds = ds.update(to_update, inplace=False)
    return xarray_api.to_netcdf(ds, *args, **kwargs)