external/engine/mmengine/fileio/handlers/yaml_handler.py

# Copyright (c) Meta Platforms, Inc. and affiliates.
# All rights reserved.
#
# This source code is licensed under the license found in the
# LICENSE file in the root directory of this source tree.

import yaml

try:
    from yaml import CDumper as Dumper  # type: ignore
    from yaml import CLoader as Loader  # type: ignore
except ImportError:
    from yaml import Loader, Dumper  # type: ignore

from .base import BaseFileHandler  # isort:skip


class YamlHandler(BaseFileHandler):

    def load_from_fileobj(self, file, **kwargs):
        kwargs.setdefault('Loader', Loader)
        return yaml.load(file, **kwargs)

    def dump_to_fileobj(self, obj, file, **kwargs):
        kwargs.setdefault('Dumper', Dumper)
        yaml.dump(obj, file, **kwargs)

    def dump_to_str(self, obj, **kwargs):
        kwargs.setdefault('Dumper', Dumper)
        return yaml.dump(obj, **kwargs)