socket-stdout-demo.py

#!/usr/bin/env python
"""Demo: use a socket as subprocesses stdin/stdout.

http://stackoverflow.com/a/19961290
"""
import socket
from contextlib import closing
from subprocess import Popen, PIPE

host = "stackoverflow.com"
with closing(socket.create_connection((host, 80))) as s:
    # send request
    Popen("cat", stdin=PIPE, stdout=s).communicate(
        b"GET /questions/19961052 HTTP/1.1\r\n" +
        "Host: {}\r\n".format(host).encode('ascii', 'strict') +
        b"Connection: close\r\n\r\n")
    # receive response
    Popen("cat", stdin=s).wait()
    s.shutdown(socket.SHUT_RDWR)  # no more sends/receives