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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def subprocessLaunch():
 """ This function is called by the hxw script. It takes no arguments, and returns an instance of HendrixDeploy """

    if not redis_available:
        raise RedisException("can't launch this subprocess without tiempo/redis.")
    try:
        action = 'start'
        options = REDIS.get('worker_args')
        assignDeploymentInstance(action='start', options=options)
    except Exception:
        chalk.red('\n Encountered an unhandled exception while trying to %s hendrix.\n' % action, pipe=chalk.stderr)
        raise