我正在用python开发awslambda中的amazonlex Chatbot，它将发出一个API post调用，并得到JSON字符串的响应，如下所示'{"_id":"598045d12e1f98980a00001e","unique_id":"ed7e4e17c7db499caee576a7761512","cerebro":{"_id":"59451b239db9fa8b0a000004","acc_id":"533a9f0d2eda783019000002","name":"cerebro","access_id":"g01n0XTwoYfEWSIP","access_token":"3Yxw8ZiUlfSPsbEVLI6Z93vZyKyBFFIV"},"bot":{"_id":"59452f42dbd13ad867000001","name":"helloword"},"rundata":{"arguments":"","target":"local"},"state":"created","queue_id":null,"s_ts":null,"e_ts":null,"response":{},"responses":[],"summary":null,"resolve_incident":false,"err":null}'

但是我只对id值感兴趣，所以我将json转换成字典，如下所示并获取id值

^{pr2}$

如果我在Lambda控制台中测试代码，我会得到输出

但我在聊天机器人中得到的输出如下所示I was unable to process your message. DependencyFailedException: Invalid Lambda Response: Received invalid response from Lambda: Can not construct instance of IntentResponse: no String-argument constructor/factory method to deserialize from String value ('59832ba22e1f98980a00009b') at [Source: "59832ba22e1f98980a00009b"; line: 1, column: 1]

我的源代码如下：import math

import dateutil.parser

import datetime

import time

import os

import logging

import requests

import uuid

logger = logging.getLogger()

logger.setLevel(logging.DEBUG)

""" --- Helpers to build responses which match the structure of the necessary dialog actions --- """

def get_slots(intent_request):

return intent_request['currentIntent']['slots']

def elicit_slot(session_attributes, intent_name, slots, slot_to_elicit, message):

return {

'sessionAttributes': session_attributes,

'dialogAction': {

'type': 'ElicitSlot',

'intentName': intent_name,

'slots': slots,

'slotToElicit': slot_to_elicit,

'message': message

}

}

def close(session_attributes, fulfillment_state, message):

response = {

'sessionAttributes': session_attributes,

'dialogAction': {

'type': 'Close',

'fulfillmentState': fulfillment_state,

'message': message

}

}

return response

def delegate(session_attributes, slots):

return {

'sessionAttributes': session_attributes,

'dialogAction': {

'type': 'Delegate',

'slots': slots

}

}

""" --- Helper Functions --- """

def parse_int(n):

try:

return int(n)

except ValueError:

return float('nan')

def build_validation_result(is_valid, violated_slot, message_content):

if message_content is None:

return {

"isValid": is_valid,

"violatedSlot": violated_slot,

}

return {

'isValid': is_valid,

'violatedSlot': violated_slot,

'message': {'contentType': 'PlainText', 'content': message_content}

}

def APIbot(intent_request):

"""

Performs dialog management and fulfillment for cluster configuration input arguments.

Beyond fulfillment, the implementation of this intent demonstrates the use of the elicitSlot dialog action

in slot validation and re-prompting.

"""

value1 = get_slots(intent_request)["myval1"]

value2 = get_slots(intent_request)["myval2"]

intense_type = get_slots(intent_request)["Instance"]

source = intent_request['invocationSource']

api_endpoint = 'url'

api_creds = {

'apiuser': 'user',

'apikey': 'key'

}

#trigger a bot run

botrun_api = api_endpoint + '/botruns'

botrun_payload = {

"botname":"helloword",

"arguments":"",

"target":"local",

"unique_id": uuid.uuid4().hex[:30] #unique run id - 30 chars max

}

headers = {

'Content-Type': 'application/json',

'Authorization': 'Key apiuser=%(apiuser)s apikey=%(apikey)s' % api_creds

}

res = requests.post(botrun_api, json=botrun_payload, headers=headers)

data = json.loads(res.content)

new_id=json_data.get('_id', None)

return new_id

# Instiate a cluster setup, and rely on the goodbye message of the bot to define the message to the end user.

# In a real bot, this would likely involve a call to a backend service.

return close(intent_request['sessionAttributes'],

'Fulfilled',

{'contentType': 'PlainText',

'content': 'Thanks, your values are {} and {} '.format(value1, value2)})

""" --- Intents --- """

def dispatch(intent_request):

"""

Called when the user specifies an intent for this bot.

"""

logger.debug('dispatch userId={}, intentName={}'.format(intent_request['userId'], intent_request['currentIntent']['name']))

intent_name = intent_request['currentIntent']['name']

# Dispatch to your bot's intent handlers

if intent_name == 'my_Values':

return APIbot(intent_request)

raise Exception('Intent with name ' + intent_name + ' not supported')

""" --- Main handler --- """

def lambda_handler(event, context):

"""

Route the incoming request based on intent.

The JSON body of the request is provided in the event slot.

"""

# By default, treat the user request as coming from the America/New_York time zone.

os.environ['TZ'] = 'America/New_York'

time.tzset()

logger.debug('event.bot.name={}'.format(event['bot']['name']))

return dispatch(event)

请提前帮我解决这个问题谢谢：)