In this example, a new instance of AsyncHTTPClient is created, and then the fetch() method is called to send an HTTP request to the URL "http://www.example.com". Once the response is received, the handle_response() function is called, which prints the response body. Example 2: Using the HTTPResponse object for error checkingpython import tornado.httpclient def handle_response(response): if response.error: print("Error:", response.error) else: print(response.body) http_client = tornado.httpclient.AsyncHTTPClient() http_client.fetch("http://www.example.com", handle_response) ``` In this example, the handle_response() function checks if there was an error while processing the request using the "response.error" attribute of the HTTPResponse object. If an error occurs, it prints the error message. Otherwise, it prints the response body. Package library: Tornado HTTPClient (part of the Tornado web framework)