keystroke.py

import BaseHTTPServer

def keep_running():
    user_keystroke = raw_input()
    if user_keystroke == 'q':
        return False
    else:
        return True

def run_while_true(server_class=BaseHTTPServer.HTTPServer,
                   handler_class=BaseHTTPServer.BaseHTTPRequestHandler):
    """
    This assumes that keep_running() is a function of no arguments which
    is tested initially and after each request.  If its return value
    is true, the server continues.
    """
    server_address = ('', 8000)
    httpd = server_class(server_address, handler_class)

    print('Serving at port 8000, press q and ENTER to stop server')

    while keep_running():
        httpd.handle_request()

if __name__ == '__main__':
    run_while_true()