文档 AWS SDK 示例 GitHub 存储库中还有更多 [S AWS DK 示例](https://github.com/awsdocs/aws-doc-sdk-examples)。

本文属于机器翻译版本。若本译文内容与英语原文存在差异，则一律以英文原文为准。

# `DescribeStep`与 AWS SDK 或 CLI 配合使用
<a name="emr_example_emr_DescribeStep_section"></a>

以下代码示例演示如何使用 `DescribeStep`。

------
#### [ CLI ]

**AWS CLI**  
以下命令描述集群中步骤 ID 为 `s-3LZC0QUT43AM` 和集群 ID 为 `j-3SD91U2E1L2QX` 的步骤：  

```
aws emr describe-step --cluster-id j-3SD91U2E1L2QX --step-id s-3LZC0QUT43AM
```
输出：  

```
{
    "Step": {
        "Status": {
            "Timeline": {
                "EndDateTime": 1433200470.481,
                "CreationDateTime": 1433199926.597,
                "StartDateTime": 1433200404.959
            },
            "State": "COMPLETED",
            "StateChangeReason": {}
        },
        "Config": {
            "Args": [
                "s3://us-west-2.elasticmapreduce/libs/hive/hive-script",
                "--base-path",
                "s3://us-west-2.elasticmapreduce/libs/hive/",
                "--install-hive",
                "--hive-versions",
                "0.13.1"
            ],
            "Jar": "s3://us-west-2.elasticmapreduce/libs/script-runner/script-runner.jar",
            "Properties": {}
        },
        "Id": "s-3LZC0QUT43AM",
        "ActionOnFailure": "TERMINATE_CLUSTER",
        "Name": "Setup hive"
    }
}
```
+  有关 API 的详细信息，请参阅*AWS CLI 命令参考[DescribeStep](https://awscli.amazonaws.com/v2/documentation/api/latest/reference/emr/describe-step.html)*中的。

------
#### [ Python ]

**适用于 Python 的 SDK（Boto3）**  
 还有更多相关信息 GitHub。在 [AWS 代码示例存储库](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/python/example_code/emr#code-examples)中查找完整示例，了解如何进行设置和运行。

```
def describe_step(cluster_id, step_id, emr_client):
    """
    Gets detailed information about the specified step, including the current state of
    the step.

    :param cluster_id: The ID of the cluster.
    :param step_id: The ID of the step.
    :param emr_client: The Boto3 EMR client object.
    :return: The retrieved information about the specified step.
    """
    try:
        response = emr_client.describe_step(ClusterId=cluster_id, StepId=step_id)
        step = response["Step"]
        logger.info("Got data for step %s.", step_id)
    except ClientError:
        logger.exception("Couldn't get data for step %s.", step_id)
        raise
    else:
        return step
```
+  有关 API 的详细信息，请参阅适用[DescribeStep](https://docs.aws.amazon.com/goto/boto3/elasticmapreduce-2009-03-31/DescribeStep)于 *Python 的AWS SDK (Boto3) API 参考*。

------
#### [ SAP ABAP ]

**适用于 SAP ABAP 的 SDK**  
 还有更多相关信息 GitHub。在 [AWS 代码示例存储库](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/sap-abap/services/emr#code-examples)中查找完整示例，了解如何进行设置和运行。

```
    TRY.
        oo_result = lo_emr->describestep(
          iv_clusterid = iv_cluster_id
          iv_stepid = iv_step_id
        ).
        DATA(lo_step) = oo_result->get_step( ).
        DATA(lv_step_name) = lo_step->get_name( ).
        MESSAGE |Retrieved step information for { lv_step_name }| TYPE 'I'.
      CATCH /aws1/cx_emrinternalserverex INTO DATA(lo_internal_error).
        DATA(lv_error) = lo_internal_error->if_message~get_text( ).
        MESSAGE lv_error TYPE 'E'.
      CATCH /aws1/cx_emrinvalidrequestex INTO DATA(lo_invalid_error).
        lv_error = lo_invalid_error->if_message~get_text( ).
        MESSAGE lv_error TYPE 'E'.
    ENDTRY.
```
+  有关 API 的详细信息，请参阅适用[DescribeStep](https://docs.aws.amazon.com/sdk-for-sap-abap/v1/api/latest/index.html)于 S *AP 的AWS SDK ABAP API 参考*。

------