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python json datetime encoder
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| import json | |
| import time | |
| import datetime | |
| import dateutil.tz | |
| class JSONEncoder(json.JSONEncoder): | |
| def default(self, obj): | |
| if isinstance(obj, datetime.datetime): | |
| offset = obj.utcoffset() | |
| return { | |
| 'type': 'datetime', | |
| 'data': [time.mktime(obj.utctimetuple()), (-time.timezone) if offset is None else offset.seconds] | |
| } | |
| if isinstance(obj, datetime.date): | |
| return { | |
| 'type': 'date', | |
| 'data': time.mktime(obj.utctimetuple()) | |
| } | |
| return super(JSONEncoder, self).default(obj) | |
| def default_object_hook(obj): | |
| if 'type' in obj and 'data' in obj: | |
| if obj['type'] == 'datetime': | |
| ts, offset = obj['data'] | |
| return datetime.datetime.fromtimestamp(ts, dateutil.tz.tzoffset(None, offset)) | |
| if obj['type'] == 'datetime': | |
| return datetime.date.fromtimestamp(obj['data']) | |
| return obj | |
| def dumps(*args, **kwargs): | |
| kwargs.setdefault('cls', JSONEncoder) | |
| return json.dumps(*args, **kwargs) | |
| def loads(*args, **kwargs): | |
| kwargs.setdefault('object_hook', default_object_hook) | |
| return json.loads(*args, **kwargs) | |
| a = datetime.datetime.now() | |
| b = dumps(a) | |
| print(a) | |
| print(b) | |
| print(loads(b)) | |
| import pytz | |
| a = datetime.datetime.now() | |
| a = pytz.timezone('Europe/Berlin').localize(a) | |
| b = dumps(a) | |
| print(a) | |
| print(b) | |
| print(loads(b)) |
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