from alibabacloud.request import APIRequest # Construct a request object for the ECS service request = APIRequest('DescribeInstances', '2014-05-26', 'GET') # Set request parameters request.add_query_param('RegionId', 'cn-hangzhou') request.add_query_param('PageSize', '10') # Send the request and get the response response = request.get_response() # Print the response body print(response.body)This example shows how to construct and send a GET request to the ECS service to describe instances in the China Hangzhou region. The `add_query_param` method is used to set request parameters, and the `get_response` method is used to send the request and get the response. Finally, the response body is printed to the console. The alibabacloud.request package is part of the Alibaba Cloud Python SDK, which provides a set of libraries and tools for working with Alibaba Cloud services.