Python: send email via AWS SES

send_ses_email.py

def send_email(subject="Website:", to="webmail@domain.com", body={'field':  'empty'}):
    """
    GIVEN A SUBJECT, TO ADDRESS AND AN OBJECT,
    SEND THE EMAIL VIA AWS SIMPLE EMAIL SERVICE

    https://boto3.amazonaws.com/v1/documentation/api/latest/reference/services/ses.html
    https://docs.aws.amazon.com/ses/latest/DeveloperGuide/send-using-sdk-python.html
    """

    # FROM email address. A constant defined elsewhere
    source_email = SOURCE_FROM_EMAIL

    if 'IS_LOCAL' in os.environ and os.environ['IS_LOCAL']:
        # TESTING LOCALLY
        # will use credentials from ~/.aws/credentials.
        session = boto3.Session(profile_name='some_profile')
    else:
        # we're running on Lambda, pull credentials automatically from assumed Role
        session = boto3.Session()


    client = session.client('ses', region_name=SES_AWS_REGION)

    text_body, html_body = build_email_body(body)

    log.debug(f"text email body: {text_body}")

    try:
        response = client.send_email(
            Source=source_email,
            Destination={
                'ToAddresses': [
                    to
                ]
            },
            ReplyToAddresses=[
                SOURCE_FROM_EMAIL
            ],
            Message={
                'Subject': {
                    'Data': subject,
                    'Charset': "UTF-8"
                },
                'Body': {
                    'Text': {
                        'Data': text_body,
                        'Charset': "UTF-8"
                    },
                    'Html': {
                        'Data': html_body,
                        'Charset': "UTF-8"
                    }
                }
            }
        )
    except ClientError as e:
        log.warning(e.response['Error']['Message'])
        return {"error": "There was a problem sending your email. Please wait a few seconds and try again"}
    else:
        log.info(f"Email sent! Message id: {response['MessageId']}")
        log.info(response)
        return {"OK": "Your email was successfully sent"}