42 lines
1.3 KiB
Python
42 lines
1.3 KiB
Python
# Copyright 2020 The Kubeflow Authors
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""Utilities for serialization/deserialization."""
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from typing import Any, Dict
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import yaml
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# Serialize None as blank instead of 'null'.
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def _represent_none(self, _):
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return self.represent_scalar('tag:yaml.org,2002:null', '')
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class _NoneAsBlankDumper(yaml.SafeDumper):
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"""Alternative dumper to print YAML literal.
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The behavior is mostly identical to yaml.SafeDumper, except for this
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dumper dumps None object as blank, instead of 'null'.
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"""
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def __init__(self, *args, **kwargs):
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super().__init__(*args, **kwargs)
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self.add_representer(type(None), _represent_none)
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def yaml_dump(data: Dict[str, Any]) -> str:
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"""Dumps YAML string.
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None will be represented as blank.
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"""
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return yaml.dump(data, Dumper=_NoneAsBlankDumper)
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