格式错误的Lambda代理响应-Python

Question

我知道这是多个问题的重复，但是由于某些原因，我无法弄清楚如何将这些解决方案应用于我的问题。该功能在Lambda测试中可以正常工作，但是在通过API网关进行测试时失败。

import boto3
import json
import decimal
from boto3.dynamodb.conditions import Key, Attr

def lambda_handler(event, context):
    dynamodb = boto3.resource('dynamodb')

    table = dynamodb.Table('some_table')

    result = table.scan()

    response = {
        "status code": 200,
        "body": result["Items"]
    }

    return response

这是错误日志

Execution log for request 
Tue Dec 31 22:47:10 UTC 2019 : Starting execution for request: 
Tue Dec 31 22:47:10 UTC 2019 : HTTP Method: GET, Resource Path: /notes
Tue Dec 31 22:47:10 UTC 2019 : Method request path: {}
Tue Dec 31 22:47:10 UTC 2019 : Method request query string: {}
Tue Dec 31 22:47:10 UTC 2019 : Method request headers: {}
Tue Dec 31 22:47:10 UTC 2019 : Method request body before transformations: 
Tue Dec 31 22:47:10 UTC 2019 : Endpoint request URI: 
Tue Dec 31 22:47:10 UTC 2019 : Endpoint request headers: {x-amzn-lambda-integration-tag=1c231f4e-97e9-405a-aadf-ce37b34ccccd, Authorization=*****************************************************************************************************************************************************************************************************************************************************************************************************************************25519d, X-Amz-Date=20191231T224710Z, x-amzn-apigateway-api-id=4tjnqn8083, X-Amz-Source-Arn=arn:aws:execute-api:561581028295:4tjnqn8083/test-invoke-stage/GET/notes, Accept=application/json, User-Agent=AmazonAPIGateway_4tjnqn8083, X-Amz-Security-Token=IQoJb3JpZ2luX2VjEI7//////////wEaDmFwLXNvdXRoZWFzdC0yIkcwRQIgWl5Cw0aOXcxA4tBC8730wNLqnDVeo98T4+nu23F0CH8CIQCfqC5gJ6U4/UaXtHMOc1riROnwTj7AbYIKs/PCGam00irHAwj3//////////8BEAIaDDc5ODM3NjExMzg1MyIM3wb8dOuNeahpJ6o1KpsDbq4XLSkUYzoiplWuxXWlXvC3sTNceGepB4Gzgwzq8Aw4KO4tcI0GXDBjaNDCTDUpI3HMfxboA6r4v2H84VJ6YiSyIfpqRrv/2DiBortTr4iTARMBIVQb+Nc1v [TRUNCATED]
Tue Dec 31 22:47:10 UTC 2019 : Endpoint request body after transformations: {"resource":"/notes","path":"/notes","httpMethod":"GET","headers":null,"multiValueHeaders":null,"queryStringParameters":null,"multiValueQueryStringParameters":null,"pathParameters":null,"stageVariables":null,"requestContext":{"resourceId":"wb2eow","resourcePath":"/notes","httpMethod":"GET","extendedRequestId":"Fl1tQG5sywMF1tg=","requestTime":"31/Dec/2019:22:47:10 +0000","path":"/notes","accountId":"34523452346","protocol":"HTTP/1.1","stage":"test-invoke-stage","domainPrefix":"testPrefix","requestTimeEpoch":1577832430388,"requestId":"1c231f4e-97e9-405a-aadf-ce37b34ccccd","identity":{"cognitoIdentityPoolId":null,"cognitoIdentityId":null,"apiKey":"test-invoke-api-key","principalOrgId":null,"cognitoAuthenticationType":null,"userArn":"arn:aws:iam::561581028295:user/sanjay","apiKeyId":"test-invoke-api-key-id","userAgent":"aws-internal/3 aws-sdk-java/1.11.690 Linux/4.9.184-0.1.ac.235.83.329.metal1.x86_64 OpenJDK_64-Bit_Server_VM/25.232-b09 java/1.8.0_232 vendor/Oracle_Co [TRUNCATED]
Tue Dec 31 22:47:10 UTC 2019 : Sending request to https://lambda.amazonaws.com/2015-03-31/functions/arn:aws:lambda:2:562534523452345:function:listMyNote/invocations
Tue Dec 31 22:47:11 UTC 2019 : Received response. Status: 200, Integration latency: 1393 ms
Tue Dec 31 22:47:11 UTC 2019 : Endpoint response headers: {Date=Tue, 31 Dec 2019 22:47:11 GMT, Content-Type=application/json, Content-Length=118, Connection=keep-alive, x-amzn-RequestId=ac66aba1-d4c3-45ec-add3-f436cf177da9, x-amzn-Remapped-Content-Length=0, X-Amz-Executed-Version=$LATEST, X-Amzn-Trace-Id=root=1-5e0bcfee-7c8dc2fff64742d811635106;sampled=0}
Tue Dec 31 22:47:11 UTC 2019 : Endpoint response body before transformations: {"status code": 200, "body": "[{'id': '00f5fe2a-2c17-11ea-b5d9-dda84499b43e', 'text': 'Hello from the other side!'}]"}
Tue Dec 31 22:47:11 UTC 2019 : Execution failed due to configuration error: Malformed Lambda proxy response
Tue Dec 31 22:47:11 UTC 2019 : Method completed with status: 502

我已经阅读了多篇文章，谈到响应主体需要是一个字符串并遵循某种预定义的格式，但是我不确定我缺少什么。任何帮助将不胜感激。

Answer 1

是statusCode。并且您应该为body返回一个字符串。

您在这里：

import json
response = {
  "statusCode": 200,
  "body": json.dumps(result["Items"])
}