解析 python 中的 Alexa json 响应以获取值名称时出现问题

Problem parsing Alexa json response in python to get value name

我已将以下意图传递给我的处理程序:

"request": {
    "type": "IntentRequest",
    "requestId": "amzn1.echo-api.request.3af5c8c3-1d1f-4169-8ce8-fde1a99a7c8d",
    "timestamp": "2019-04-03T04:08:06Z",
    "locale": "en-US",
    "intent": {
        "name": "get_speeds",
        "confirmationStatus": "NONE",
        "slots": {
            "direction": {
                "name": "direction",
                "value": "inbound",
                "resolutions": {
                    "resolutionsPerAuthority": [
                        {
                            "authority": "amzn1.er-authority.echo-sdk.amzn1.ask.skill.e76bf13b-71ac-4a90-94d4-597aa597ae87.direction",
                            "status": {
                                "code": "ER_SUCCESS_MATCH"
                            },
                            "values": [
                                {
                                    "value": {
                                        "name": "inbound",
                                        "id": "a8e6fe5b9e68f30a146cefebaa7edcc3"
                                    }
                                }
                            ]
                        }
                    ]
                },
                "confirmationStatus": "NONE",
                "source": "USER"
            }
        }
    },
    "dialogState": "COMPLETED"
}

我想提取实际值,而不是话语,例如值名称,在本例中为 "inbound"。我试过这个和各种类似的迭代(打印用于调试):

    slots = handler_input.request_envelope.request.intent.slots
    resolutions = slots["direction"].resolutions
    print(resolutions)
    print(resolutions["resolutions_per_authority"])
    direction = resolutions["resolutions_per_authority"][0]["values"][0]["value"]["name"]
    session_attr = handler_input.attributes_manager.session_attributes

我也对 "resolutionsPerAuthority" 进行了相同的尝试,这是传递的 JSON,但显然不是我程序的结果,因为日志有:

04:08:07
{'resolutions_per_authority': [{'authority': 'amzn1.er-authority.echo-sdk.amzn1.ask.skill.e76bf13b-71ac-4a90-94d4-597aa597ae87.direction',

04:08:07
'status': {'code': 'ER_SUCCESS_MATCH'},

04:08:07
'values': [{'value': {'id': 'a8e6fe5b9e68f30a146cefebaa7edcc3',

04:08:07
'name': 'inbound'}}]}]}

04:08:07
'Resolutions' object is not subscriptable

这是我在所有方法中不断遇到的错误:'Resolutions' 对象不可订阅。有人可以帮助我如何提取规范插槽值吗?我需要为其他几个意图做同样的事情,但我想如果我能让这个工作正常,它将成为其他人的榜样。

好的,我终于找到了一个 python 示例,它使用了相对较新的 SDK 的面向对象版本,就像我一样。该示例是亚马逊 PetMatch 示例的 python 版本。

基于此,以下方法有效:

slots = handler_input.request_envelope.request.intent.slots
direction = slots["direction"].resolutions.resolutions_per_authority[0].values[0].value.name

我仍然希望更好地了解它是如何工作的,但至少它是有效的,并且还可以帮助其他人。我发现 Alexa 示例和文档有很多,但组织得不好,而且 api 一直在变化,所以你发现的一些东西已经过时了。

正如您已经指出的,您的问题是您将解析对象视为可订阅的,并通过

访问它
resolutions.resolutions_per_authority[0].values[0].value

才是正确的获取方式

指出可能会有所帮助,如果有多个匹配项,Alexa 将return按照最可能匹配用户意图的顺序排列分辨率。

此代码片段迭代插槽和 return 一个 python 字典,其中仅包含键以了解它是否已通过验证以及匹配值的 ID:

from ask_sdk_model.slu.entityresolution import StatusCode

@staticmethod
def get_slot_values(filled_slots):
    """Return slot values with additional info."""
    slot_values = {}
    logger.info("Filled slots: {}".format(filled_slots).replace("\n", "\r"))

    for key, slot_item in six.iteritems(filled_slots):
        name = slot_item.name
        try:
            status_code = slot_item.resolutions.resolutions_per_authority[0].status.code

            if status_code == StatusCode.ER_SUCCESS_MATCH:
                slot_values[name] = {
                    "synonym": slot_item.value,
                    "resolved": slot_item.resolutions.resolutions_per_authority[0].values[0].value.__dict__,  # to make it JSON serializable
                    "is_validated": True,
                }
            elif status_code == StatusCode.ER_SUCCESS_NO_MATCH:
                slot_values[name] = {
                    "synonym": slot_item.value,
                    "resolved": slot_item.value,
                    "is_validated": False,
                }
            else:
                pass
        except (AttributeError, ValueError, KeyError, IndexError, TypeError) as e:
            # for BUILT-IN intents, there are no resolutions, but the value is specified
            if slot_item.value is not None and slot_item.value != 'NONE':
                slot_values[name] = {
                    "synonym": slot_item.value,
                    "resolved": slot_item.value,
                    "is_validated": True,
                }
            else:
                logger.info("SLOT {} UNRESOLVED".format(name))
                slot_values[name] = {
                    "synonym": slot_item.value,
                    "resolved": slot_item.value,
                    "is_validated": False,
                }
    return slot_values

其中 filled_slots = handler_input.request_envelope.request.intent.slots