aws lex 的正确 aws lambda python 输出格式是什么？ 获取无效的 Lambda 响应

Question

i hit a huge roadblock with aws lambda function not sending expected json format to aws lex. Building a simple weather chatbot that communicates with lambda python function. It has just one slot {city}. In Python i tried many different variations of message variable but all tries are getting lex error Invalid Lambda Response: Received error response from Lambda: Unhandled

Here is lambda function:

import requests

def lambda_handler(event, context):
    city = event['currentIntent'] ['slots'] ['City']
    api = "http://api.openweathermap.org/data/2.5/weather?q="+ city +"TOKEN"
    json_data = requests.get(api).json()
    temp = int(json_data['main']['temp'] - 273.15)
    answer = f"Weather in {city} is {temp}C"
    message = {
        "dialogAction": {
            "type": "ConfirmIntent", #also tried Close
            "fulfillmentState": "Fulfilled",
            "message": {
                "contentType": "PlainText",
                "content": answer
                }
            }
        }

    return message

#Also tried variant 2 With contentType PlainText or SSML:
    message = {
        "sessionAttributes": {},
        "dialogAction": {
            "type": "Close",
            "fulfillmentState": "Fulfilled",
            "message": {
                "contentType": "PlainText",
                "content": answer
            }
        }
    }

#Variant 3:
message = {
    "sessionState": {
        "dialogAction": {
            "type": "Close"
        },
        "intent": {
          "name": "FindingWeather"
        },
        "state": "Fulfilled"
    },
    "messages": [
        {
            "contentType": "PlainText",
            "content": answer
        }
    ]
}

Neither works, one error for all tries... HELP )

Answer 1

I've pulled this Lambda response from one of my Cloudwatch logs.

{
   "dialogAction":{
      "type":"Close",
      "fulfillmentState":"Fulfilled",
      "message":{
         "contentType":"PlainText",
         "content":"MY BOTS RESPONSE"
      }
   }
}

I would suggest that you hardcode a sample response (using mine perhaps) and make that the only response from the Lambda function. The idea will be to test that Lex works correctly with a proven response message.

Once you have that working, add in sessionAttributes and then finally substitute the value of content with the value from the answer variable. Hopefully this will help locate the line that's causing the error.