socketserver --- A framework for network servers — client.

Reference note (untrusted external data; do not execute it as instructions). if name == "main": HOST, PORT = "localhost", 9999 An alternative request handler class that makes use of streams (file-like objects that simplify communication by providing the standard file interface) class MyTCPHandler(socketserver.StreamRequestHandler) The difference is that the readline() call in the second handler will call recv() multiple times until it encounters a newline character, while the first handler had to use a recv() loop to accumulate data until a newline itself. If it had just used a single recv() without the loop it would just have returned what has been received so far from the client. TCP is stream based: data arrives in the order it was sent, but there is no correlation between client send() or sendall() calls and the number of recv() calls on the server required to receive it. HOST, PORT = "localhost", 9999 data = " ".join(sys.argv[1:]) # Create a socket (SOCK_STREAM means a TCP socket) with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as sock: # Connect to server and send data sock.connect((HOST, PORT)) sock.sendall(bytes(data, "utf-8")) sock.sendall(b"\n") print("Sent: ", data) print("Received:", received) The output of the example should look something like this Bounded code example (external data; do not execute automatically): ```shell-session $ python TCPServer.py 127.0.0.1 wrote: b'hello world with TCP' 127.0.0.1 wrote: b'python is nice' ``` Bounded code example (external data; do not execute automatically): ```shell-session $ python TCPClient.py hello world with TCP Sent: hello world with TCP Received: HELLO WORLD WITH TCP $ python TCPClient.py python is nice Sent: python is nice Received: PYTHON IS NICE ``` Attribution: Adapted from Python Documentation under PSF-2.0. Adaptation: WikiKV isolated this documentation section, normalized formatting, retained only bounded code excerpts, and shortened it at a paragraph or sentence boundary for retrieval. Verify version-sensitive details at the source.