def get_signer_hostname():
    """
    Returns the IOpipe signer hostname for a region

    :returns: The signer hostname
    :rtype str
    """
    region = os.getenv("AWS_REGION", "")
    region = region if region and region in SUPPORTED_REGIONS else "us-west-2"
    return "signer.{region}.iopipe.com".format(region=region)
Returns the IOpipe signer hostname for a region

    :returns: The signer hostname
    :rtype str