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。

# 与 AWS SDK `ListFlowVersions` 配合使用
<a name="bedrock-agent_example_bedrock-agent_ListFlowVersions_section"></a>

以下代码示例演示了如何使用 `ListFlowVersions`。

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#### [ 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/bedrock-agent#code-examples)中查找完整示例，了解如何进行设置和运行。
列出 Amazon Bedrock 流的版本。  

```
def list_flow_versions(client, flow_id):
    """
    Lists the versions of an Amazon Bedrock flow.

    Args:
        client: Amazon bedrock agent boto3 client.
        flow_id (str): The identifier of the flow.

    Returns:
        dict: The response from ListFlowVersions.
    """
    try:

        finished = False

        logger.info("Listing flow versions for flow: %s.", flow_id)

        response = client.list_flow_versions(
            flowIdentifier=flow_id,
            maxResults=10)

        while finished is False:

            print(f"Versions for flow:{flow_id}")
            for version in response['flowVersionSummaries']:
                print(f"Version: {version['version']}")
                print(f"Status: {version['status']}\n")

                if 'nextToken' in response:
                    next_token = response['nextToken']
                    response = client.list_flow_versions(maxResults=10,
                                                nextToken=next_token)
                else:
                    finished = True


        logging.info("Successfully listed flow versions for flow %s.",
                flow_id)
        
        return response

    except ClientError as e:
        logging.exception("Client error listing flow versions: %s", str(e))
        raise
    except Exception as e:
        logging.exception("Unexpected error listing flow versions: %s", str(e))
        raise
```
+  有关 API 的详细信息，请参阅适用[ListFlowVersions](https://docs.aws.amazon.com/goto/boto3/bedrock-agent-2023-12-12/ListFlowVersions)于 *Python 的AWS SDK (Boto3) API 参考*。

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