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# 你好 CloudWatch 日志
<a name="example_cloudwatch-logs_Hello_section"></a>

以下代码示例显示了如何开始使用 L CloudWatch ogs。

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#### [ Python ]

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

```
def hello_cloudwatch_logs() -> None:
    """
    Verifies connectivity to CloudWatch Logs by calling DescribeLogGroups
    and displaying the first page of log groups with name, ARN, and
    creation time.
    """
    logs_client = boto3.client("logs")

    try:
        response = logs_client.describe_log_groups()
        log_groups = response.get("logGroups", list())

        if not log_groups:
            print("No log groups found in this Region for your account.")
        else:
            print(f"Found {len(log_groups)} log group(s):\n")
            for lg in log_groups:
                name = lg.get("logGroupName", "N/A")
                arn = lg.get("arn", "N/A")
                creation_ms = lg.get("creationTime", 0)
                creation_dt = datetime.fromtimestamp(
                    creation_ms / 1000, tz=timezone.utc
                )
                print(f"  Name: {name}")
                print(f"  ARN:  {arn}")
                print(f"  Created: {creation_dt.strftime('%Y-%m-%d %H:%M:%S UTC')}")
                print()

    except ClientError as error:
        logger.error(
            "Failed to describe log groups: %s",
            error.response["Error"]["Message"],
        )
        raise
```
+  有关 API 的详细信息，请参阅适用[DescribeLogGroups](https://docs.amazonaws.cn/goto/boto3/logs-2014-03-28/DescribeLogGroups)于 *Python 的Amazon SDK (Boto3) API 参考*。

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有关 S Amazon DK 开发者指南和代码示例的完整列表，请参阅[将 L CloudWatch ogs 与 Amazon SDK](sdk-general-information-section.md)。本主题还包括有关入门的信息以及有关先前的 SDK 版本的详细信息。