AWS Lambda function (HTTP) - Both Amazon API Gateway and AWS ALB

index.py

def handler(event, context):
    input = extract_input_from_event('ALB', event)
    output = my_business_logic(input)
    return format_output_for('ALB', output)

def extract_input_from_event(alb_or_apigw, event):
    # extract data from input event
    
def format_output_for(alb_or_apigw, output):
    # return a json object

def my_business_logic(data):
    # implement business logic here