重启作业

start_job

当作业的状态为Stopped或者Failed，才可以调用该接口。当 Failed 状态的作业重启之后，已经运行成功的实例不会重新运行。

参数说明：

返回值说明：

start_job方法将返回一个 ActionResponse 对象， ActionResponse仅提供了request ID和状态码两个属性。

e.g.

try:
    # Get a Client object.
    client = Client(...
    ...
    # Job ID.
    job = "job-xxxx"
    job_detail = client.get_job(job)
    if job_detail.State == "Stopped":
        # Only stopped job can be restarted.
        client.start_job(job)
    job_detail = client.get_job(job)
    assert job_detail.State in ["Waiting", "Running"]
except ClientError, e:
    print(e)