forked from PulseFocusPlatform/PulseFocusPlatform
119 lines
3.5 KiB
Python
119 lines
3.5 KiB
Python
# Copyright (c) 2019 PaddlePaddle Authors. All Rights Reserved.
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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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import importlib
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import inspect
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import yaml
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from .schema import SharedConfig
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__all__ = ['serializable', 'Callable']
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def represent_dictionary_order(self, dict_data):
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return self.represent_mapping('tag:yaml.org,2002:map', dict_data.items())
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def setup_orderdict():
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from collections import OrderedDict
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yaml.add_representer(OrderedDict, represent_dictionary_order)
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def _make_python_constructor(cls):
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def python_constructor(loader, node):
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if isinstance(node, yaml.SequenceNode):
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args = loader.construct_sequence(node, deep=True)
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return cls(*args)
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else:
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kwargs = loader.construct_mapping(node, deep=True)
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try:
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return cls(**kwargs)
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except Exception as ex:
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print("Error when construct {} instance from yaml config".
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format(cls.__name__))
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raise ex
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return python_constructor
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def _make_python_representer(cls):
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# python 2 compatibility
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if hasattr(inspect, 'getfullargspec'):
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argspec = inspect.getfullargspec(cls)
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else:
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argspec = inspect.getfullargspec(cls.__init__)
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argnames = [arg for arg in argspec.args if arg != 'self']
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def python_representer(dumper, obj):
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if argnames:
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data = {name: getattr(obj, name) for name in argnames}
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else:
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data = obj.__dict__
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if '_id' in data:
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del data['_id']
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return dumper.represent_mapping(u'!{}'.format(cls.__name__), data)
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return python_representer
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def serializable(cls):
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"""
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Add loader and dumper for given class, which must be
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"trivially serializable"
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Args:
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cls: class to be serialized
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Returns: cls
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"""
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yaml.add_constructor(u'!{}'.format(cls.__name__),
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_make_python_constructor(cls))
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yaml.add_representer(cls, _make_python_representer(cls))
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return cls
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yaml.add_representer(SharedConfig,
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lambda d, o: d.represent_data(o.default_value))
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@serializable
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class Callable(object):
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"""
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Helper to be used in Yaml for creating arbitrary class objects
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Args:
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full_type (str): the full module path to target function
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"""
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def __init__(self, full_type, args=[], kwargs={}):
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super(Callable, self).__init__()
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self.full_type = full_type
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self.args = args
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self.kwargs = kwargs
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def __call__(self):
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if '.' in self.full_type:
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idx = self.full_type.rfind('.')
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module = importlib.import_module(self.full_type[:idx])
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func_name = self.full_type[idx + 1:]
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else:
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try:
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module = importlib.import_module('builtins')
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except Exception:
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module = importlib.import_module('__builtin__')
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func_name = self.full_type
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func = getattr(module, func_name)
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return func(*self.args, **self.kwargs)
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