[Python]AWS Lex 串接 Lambda Python3.7
@ GordonWei · Friday, Apr 17, 2020 · 2 minute read · Update at Apr 17, 2020

最近剛好在寫一些給公司用的機器人.

用到了AWS Lex串接Lambda.

AWS Lex的就直接跳過.

AWS Lex訊息是由json格式來傳遞的.

格式範例如下:

{
  "currentIntent": {
    "name": "intent-name",
    "slots": {
      "slot name": "value",
      "slot name": "value"
    },
    "slotDetails": {
      "slot name": {
        "resolutions" : [
          { "value": "resolved value" },
          { "value": "resolved value" }
        ],
        "originalValue": "original text"
      },
      "slot name": {
        "resolutions" : [
          { "value": "resolved value" },
          { "value": "resolved value" }
        ],
        "originalValue": "original text"
      }
    },
    "confirmationStatus": "None, Confirmed, or Denied (intent confirmation, if configured)"
  },
  "bot": {
    "name": "bot name",
    "alias": "bot alias",
    "version": "bot version"
  },
  "userId": "User ID specified in the POST request to Amazon Lex.",
  "inputTranscript": "Text used to process the request",
  "invocationSource": "FulfillmentCodeHook or DialogCodeHook",
  "outputDialogMode": "Text or Voice, based on ContentType request header in runtime API request",
  "messageVersion": "1.0",
  "sessionAttributes": { 
     "key": "value",
     "key": "value"
  },
  "requestAttributes": { 
     "key": "value",
     "key": "value"
  },
  "recentIntentSummaryView": [
    {
        "intentName": "Name",
        "checkpointLabel": Label,
        "slots": {
          "slot name": "value",
          "slot name": "value"
        },
        "confirmationStatus": "None, Confirmed, or Denied (intent confirmation, if configured)",
        "dialogActionType": "ElicitIntent, ElicitSlot, ConfirmIntent, Delegate, or Close",
        "fulfillmentState": "Fulfilled or Failed",
        "slotToElicit": "Next slot to elicit"
    }
  ],
   "sentimentResponse": { 
      "sentimentLabel": "sentiment",
      "sentimentScore": "score"
   }
}

雖然上面落落長, 但我們要的只需要currentIntent底下的資訊.

所以在抓取slots的部分Lambda會用到的程式碼如下:

def yourLamda_handler(event, context):
	variableA = event['currentIntent']['slots']['varA']
	variableB = event['currentIntent']['slots']['varB']
	...
	...
	...
	return something

Lambda就會接收到在AWS Lex的中設定的slots varA & varB.

然後在擷取出來做一些動作.

官方文件參考

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GordonWei

小弟是一位沒錢又沒閒的普通人, 只能靠自學以及不斷的實作來吸取經驗。

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