json.py 文件源码

def default(self, o):
        if isinstance(o, uuid.UUID):
            return o.hex
        elif isinstance(o, datetime.datetime):
            return o.strftime('%Y-%m-%dT%H:%M:%S.%fZ')
        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, (set, frozenset)):
            return list(o)
        elif isinstance(o, decimal.Decimal):
            return str(o)
        return super(BetterJSONEncoder, self).default(o)