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import json |
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import numpy as np |
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from .base import BaseFileHandler |
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def set_default(obj): |
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"""Set default json values for non-serializable values. |
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It helps convert ``set``, ``range`` and ``np.ndarray`` data types to list. |
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It also converts ``np.generic`` (including ``np.int32``, ``np.float32``, |
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etc.) into plain numbers of plain python built-in types. |
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""" |
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if isinstance(obj, (set, range)): |
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return list(obj) |
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elif isinstance(obj, np.ndarray): |
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return obj.tolist() |
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elif isinstance(obj, np.generic): |
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return obj.item() |
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raise TypeError(f'{type(obj)} is unsupported for json dump') |
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class JsonHandler(BaseFileHandler): |
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def load_from_fileobj(self, file): |
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return json.load(file) |
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def dump_to_fileobj(self, obj, file, **kwargs): |
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kwargs.setdefault('default', set_default) |
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json.dump(obj, file, **kwargs) |
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def dump_to_str(self, obj, **kwargs): |
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kwargs.setdefault('default', set_default) |
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return json.dumps(obj, **kwargs) |
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