def get_transport(name):
    '''
    Return the transport class.
    '''
    try:
        log.debug('Using %s as transport', name)
        return TRANSPORT_LOOKUP[name]
    except KeyError:
        msg = 'Transport {} is not available. Are the dependencies installed?'.format(name)
        log.error(msg, exc_info=True)
        raise InvalidTransportException(msg)
Return the transport class.