轮询长时间运行的操作

如要轮询操作，请重复调用 get_long_running_operation() 方法，直到操作完成。在每个轮询请求之间使用退避时间，例如 10 秒。

深入探索

如需查看包含此代码示例的详细文档，请参阅以下内容：

• 管理长时间运行的操作 (LRO)

代码示例

Python

如需了解详情，请参阅 Document AI Python API 参考文档。

如需向 Document AI 进行身份验证，请设置应用默认凭据。 如需了解详情，请参阅为本地开发环境设置身份验证。

from time import sleep

from google.api_core.client_options import ClientOptions
from google.cloud import documentai  # type: ignore
from google.longrunning.operations_pb2 import GetOperationRequest  # type: ignore

# TODO(developer): Uncomment these variables before running the sample.
# location = "YOUR_PROCESSOR_LOCATION"  # Format is "us" or "eu"
# operation_name = "YOUR_OPERATION_NAME"  # Format is "projects/{project_id}/locations/{location}/operations/{operation_id}"


def poll_operation_sample(location: str, operation_name: str) -> None:
    # You must set the `api_endpoint` if you use a location other than "us".
    opts = ClientOptions(api_endpoint=f"{location}-documentai.googleapis.com")
    client = documentai.DocumentProcessorServiceClient(client_options=opts)

    request = GetOperationRequest(name=operation_name)

    while True:
        # Make GetOperation request
        operation = client.get_operation(request=request)
        # Print the Operation Information
        print(operation)

        # Stop polling when Operation is no longer running
        if operation.done:
            break

        # Wait 10 seconds before polling again
        sleep(10)

后续步骤

如需搜索和过滤其他 Google Cloud 产品的代码示例，请参阅Google Cloud 示例浏览器。