AWS Step Functions - Python

import boto3
import json

lambda_client = boto3.client(
    service_name='lambda',
    region_name='us-east-2',
    aws_access_key_id='ACCESS_KEY',
    aws_secret_access_key='SECRET_KEY'
)

response = lambda_client.invoke(
	FunctionName='HelloWorld',
	InvocationType='RequestResponse',
	LogType='None',
	Payload=b'{"name": "'+'World'+'"}'
)

sf_client = boto3.client(
    service_name='stepfunctions',
    region_name='us-east-2',
    aws_access_key_id='ACCESS_KEY',
    aws_secret_access_key='SECRET_KEY'
)

response = sf_client.start_execution(
    stateMachineArn='arn:aws:states:us-east-2:ACCOUNT_NUMBER:stateMachine:HelloWorldSM',
    input='{"name":"Despicable Me"}'
)

response1 = sf_client.describe_execution(
    executionArn=response['executionArn'],
)
print json.dumps(response1, indent=4, sort_keys=True, default=str)

response2 = sf_client.get_execution_history(
    executionArn=response['executionArn'],
)
print json.dumps(response2, indent=4, sort_keys=True, default=str)

activity_poll = sf_client.get_activity_task(
    activityArn='arn:aws:states:us-east-2:ACCOUNT_NUMBER:activity:add-greeting'
)

activity_output = sf_client.send_task_success(
    taskToken=activity_poll['taskToken'],
    output=activity_poll['input']+', Good Night'
)