Source code for satpy.dataset.anc_vars

#!/usr/bin/env python
# -*- coding: utf-8 -*-
# Copyright (c) 2015-2020 Satpy developers
# This file is part of satpy.
# satpy is free software: you can redistribute it and/or modify it under the
# terms of the GNU General Public License as published by the Free Software
# Foundation, either version 3 of the License, or (at your option) any later
# version.
# satpy is distributed in the hope that it will be useful, but WITHOUT ANY
# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
# A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
# You should have received a copy of the GNU General Public License along with
# satpy.  If not, see <>.
"""Utilities for dealing with ancillary variables."""

from .dataid import DataID, default_id_keys_config

[docs]def dataset_walker(datasets): """Walk through *datasets* and their ancillary data. Yields datasets and their parent. """ for dataset in datasets: yield dataset, None for anc_ds in dataset.attrs.get('ancillary_variables', []): try: anc_ds.attrs yield anc_ds, dataset except AttributeError: continue
[docs]def replace_anc(dataset, parent_dataset): """Replace *dataset* the *parent_dataset*'s `ancillary_variables` field.""" if parent_dataset is None: return id_keys = parent_dataset.attrs.get( '_satpy_id_keys', dataset.attrs.get( '_satpy_id_keys', default_id_keys_config)) current_dataid = DataID(id_keys, **dataset.attrs) for idx, ds in enumerate(parent_dataset.attrs['ancillary_variables']): if current_dataid == DataID(id_keys, **ds.attrs): parent_dataset.attrs['ancillary_variables'][idx] = dataset return