serializers.py 文件源码

def default(self, obj):
        replacer = self.__type_replacements.get(type(obj), None)
        if replacer:
            obj = replacer(obj)
        if isinstance(obj, set):
            return tuple(obj)  # msgpack module can't deal with sets so we make a tuple out of it
        if isinstance(obj, uuid.UUID):
            return str(obj)
        if isinstance(obj, bytearray):
            return bytes(obj)
        if isinstance(obj, complex):
            return msgpack.ExtType(0x30, struct.pack("dd", obj.real, obj.imag))
        if isinstance(obj, datetime.datetime):
            if obj.tzinfo:
                raise errors.SerializeError("msgpack cannot serialize datetime with timezone info")
            return msgpack.ExtType(0x32, struct.pack("d", obj.timestamp()))
        if isinstance(obj, datetime.date):
            return msgpack.ExtType(0x33, struct.pack("l", obj.toordinal()))
        if isinstance(obj, decimal.Decimal):
            return str(obj)
        if isinstance(obj, numbers.Number):
            return msgpack.ExtType(0x31, str(obj).encode("ascii"))     # long
        return self.class_to_dict(obj)