Call AWS lambda function from an existing lambda function on Python 2.7

Question

I'm trying to call another lambda function from an existing lambda fucntion as below (python 2.7)

from __future__ import print_function
import boto3
import json

lambda_client = boto3.client('lambda')

def lambda_handler(event, context):

    invoke_response = lambda_client.invoke(FunctionName="teststack",
                                           InvocationType='RequestResponse'
                                           )
    print(invoke_response)

    return str(invoke_response)

I'm gettting the below response instead of an actual result. When I run teststack lambda invidually it works fine, but getting below response instead of "test" returned by the teststack Lambda function.

{u'Payload': <botocore.response.StreamingBody object at ****>, 'ResponseMetadata': {'HTTPStatusCode': 200, 'RequestId': '******', 'HTTPHeaders': {'x-amzn-requestid': '******', 'content-length': '155', 'x-amzn-remapped-content-length': '0', 'connection': 'keep-alive', 'date': 'Sun, 17 Jul 2016 21:02:01 GMT', 'content-type': 'application/json'}}, u'StatusCode': 200}

i got solution from this thread stackoverflow.com/questions/36784925/… THanks!! — shiv455
– shiv455, Commented Jul 18, 2016 at 1:11
Possible duplicate of how to get return response from AWS Lambda function — Gricey
– Gricey, Commented May 21, 2017 at 0:23
@Gricey, the other question deals with asynchronous call (HTTP 202, "Event"). Here it's a synchronous call (HTTP 200, "RequestResponse"). So... Not a duplicate. At least not this one. — Grzegorz Oledzki
– Grzegorz Oledzki, Commented Oct 7, 2017 at 10:00
@GrzegorzOledzki the answer to the duplicate I link says that they should be using RequestResponse. However I've added an answer so that there's something here for the question as asked. — Gricey
– Gricey, Commented Oct 8, 2017 at 5:33

Gricey · Accepted Answer · 2017-10-08 05:32:25Z

22

The response data you're looking for is there, it's just inside the Payload as a StreamingBody object.

According to the Boto docs, you can read the object using the read method:

invoke_response['Payload'].read()

answered Oct 8, 2017 at 5:32

Gricey

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