Aws Lambda that calls other lambda with the same parameters?

Question

I have a lambda function that needs to call another lambda and pass the same input parameters (event dictionary) However, my invocation fails. My invocation for 1st lambda is an s3 event

lambda_s3.invoke(
FunctionName='Function',
InvocationType='Event',
Payload=json.dumps(event)
)

I assume that Payload doesn't really work. How can I encode the payload so it's readable by the other lambda

json of the event that I try to pass:

        {  
    'Records':[  
        {  
            'eventVersion':'2.0',
            'eventSource':'aws:s3',
            'awsRegion':'us-east-1',
            'eventTime':'1970-01-01T00:00:00.000Z',
            'eventName':'ObjectCreated:Put',
            'userIdentity':{  
                'principalId':'AIDAJDPLRKLG7UEXAMPLE'
            },
            'requestParameters':{  
                'sourceIPAddress':'127.0.0.1'
            },
            'responseElements':{  
                'x-amz-request-id':'C3D13FE58DE4C810',
                'x-amz-id-2':'FMyUVURIY8/IgAtTv8xRjskZQpcIZ9KG4V5Wp6S7S/JRWeUWerMUE5JgHvANOjpD'
            },
            's3':{  
                's3SchemaVersion':'1.0',
                'configurationId':'testConfigRule',
                'bucket':{  
                'name':'my-faces-data',
                'ownerIdentity':{  
                    'principalId':'A3NL1KOZZKExample'
                },
                'arn':'arn:aws:s3:::my-faces-data'
                },
                'object':{  
                'key':'images/banana.jpg',
                'size':1024,
                'eTag':'d41d8cd98f00b204e9800998ecf8427e',
                'versionId':'096fKKXTRTtl3on89fVO.nfljtsv6qko'
                }
            }
        }
    ]}

Answer 1

You need to encode the payload. Your invocation should look like this:

lambda_s3.invoke(
    FunctionName='Function',
    InvocationType='RequestResponse',
    Payload=json.dumps(event).encode()
)

Python boto3 explanation can be found here.