Python json.dumps可以通过encoder选项自定义转换方式。
默认的encoder(json.JSONEncoder) 只对部分进行了转化:
"""Extensible JSON <http://json.org> encoder for Python data structures. Supports the following objects and types by default: +-------------------+---------------+ | Python | JSON | +===================+===============+ | dict | object | +-------------------+---------------+ | list, tuple | array | +-------------------+---------------+ | str | string | +-------------------+---------------+ | int, float | number | +-------------------+---------------+ | True | true | +-------------------+---------------+ | False | false | +-------------------+---------------+ | None | null | +-------------------+---------------+ To extend this to recognize other objects, subclass and implement a ``.default()`` method with another method that returns a serializable object for ``o`` if possible, otherwise it should call the superclass implementation (to raise ``TypeError``).
如文档描述,自定义需要重写default方法,如django 中Jsonresponse方法默认的encoder DjangoJSONEncoder
from django.core.serializers.json import DjangoJSONEncoder class DjangoJSONEncoder(json.JSONEncoder): """ JSONEncoder subclass that knows how to encode date/time, decimal types, and UUIDs. """ def default(self, o): # See "Date Time String Format" in the ECMA-262 specification. if isinstance(o, datetime.datetime): r = o.isoformat() if o.microsecond: r = r[:23] + r[26:] if r.endswith('+00:00'): r = r[:-6] + 'Z' return r elif isinstance(o, datetime.date): return o.isoformat() elif isinstance(o, datetime.time): if is_aware(o): raise ValueError("JSON can't represent timezone-aware times.") r = o.isoformat() if o.microsecond: r = r[:12] return r elif isinstance(o, datetime.timedelta): return duration_iso_string(o) elif isinstance(o, (decimal.Decimal, uuid.UUID, Promise)): return str(o) else: return super().default(o)
用法 json.dumps({...},cls=DjangoJSONEncoder)
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