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)。

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# 与 AWS SDK `UpdateApplication` 配合使用
<a name="kinesis-analytics-v2_example_kinesis-analytics-v2_UpdateApplication_section"></a>

以下代码示例演示了如何使用 `UpdateApplication`。

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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/kinesis-analytics-v2#code-examples)中查找完整示例，了解如何进行设置和运行。
此示例将更新在现有应用程序中运行的代码。  

```
class KinesisAnalyticsApplicationV2:
    """Encapsulates Kinesis Data Analytics application functions."""

    def __init__(self, analytics_client):
        """
        :param analytics_client: A Boto3 Kinesis Data Analytics v2 client.
        """
        self.analytics_client = analytics_client
        self.name = None
        self.arn = None
        self.version_id = None
        self.create_timestamp = None


    def update_code(self, code):
        """
        Updates the code that runs in the application. The code must run in the
        runtime environment of the application, such as SQL. Application code
        typically reads data from in-application streams and transforms it in some way.

        :param code: The code to upload. This completely replaces any existing code
                     in the application.
        :return: Metadata about the application.
        """
        try:
            response = self.analytics_client.update_application(
                ApplicationName=self.name,
                CurrentApplicationVersionId=self.version_id,
                ApplicationConfigurationUpdate={
                    "ApplicationCodeConfigurationUpdate": {
                        "CodeContentTypeUpdate": "PLAINTEXT",
                        "CodeContentUpdate": {"TextContentUpdate": code},
                    }
                },
            )
            details = response["ApplicationDetail"]
            self.version_id = details["ApplicationVersionId"]
            logger.info("Update code for application %s.", self.name)
        except ClientError:
            logger.exception("Couldn't update code for application %s.", self.name)
            raise
        else:
            return details
```
+  有关 API 的详细信息，请参阅适用[UpdateApplication](https://docs.aws.amazon.com/goto/boto3/kinesisanalyticsv2-2018-05-23/UpdateApplication)于 *Python 的AWS SDK (Boto3) API 参考*。

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