boto3 create a s3 session client

s3-session-client-boto3.py

def setup_s3_client(job_data):
    """Creates an S3 client

    Uses the credentials passed in the event by CodePipeline. These
    credentials can be used to access the artifact bucket.

    :param job_data: The job data structure
    :return: An S3 client with the appropriate credentials

    """
    try:
        key_id = job_data['artifactCredentials']['accessKeyId']
        key_secret = job_data['artifactCredentials']['secretAccessKey']
        session_token = job_data['artifactCredentials']['sessionToken']
        session = Session(aws_access_key_id=key_id,
                          aws_secret_access_key=key_secret,
                          aws_session_token=session_token)
    except Exception as e:
        logger.warn('No credentials in artifact - using default role access: {}'.format(e))
        session = Session()

    return session.client('s3', config=botocore.client.Config(signature_version='s3v4'))