send_email.py

def send_email(html_payload):
    url = "https://xxxx.execute-api.us-east-1.amazonaws.com/default/lambda-function-sendEmail"

    payload = json.dumps({
        "html": html_payload
    })

    headers = {
        'Content-Type': 'application/json'
    }

    response = json.loads(requests.get(url, headers=headers, data=payload).text)

    return response['response']

response = send_email(html_body)