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