28 lines
753 B
Python
28 lines
753 B
Python
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import dataclasses
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import json
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from dataclasses import dataclass
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@dataclass(init=False)
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class DataclassBase:
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def __init__(self, **kwargs):
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names = set([f.name for f in dataclasses.fields(self)])
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for k, v in kwargs.items():
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if k in names:
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setattr(self, k, v)
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class Singleton(type):
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_instances = {}
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def __call__(cls, *args, **kwargs):
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if cls not in cls._instances:
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cls._instances[cls] = super(Singleton, cls).__call__(*args, **kwargs)
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return cls._instances[cls]
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class DataclassJSONEncoder(json.JSONEncoder):
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def default(self, o):
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if dataclasses.is_dataclass(o):
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return dataclasses.asdict(o)
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return super().default(o)
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