Question

I would like to be able to control a remote Python interpreter over an SSH connection, and drive it from Python itself.

I’ve got a basic template:

ssh.connect(servername, serverport, username,  key_filename=key_filename)

transport = ssh.get_transport()
channel = transport.open_session()

channel.exec_command(PATH_TO_EXEC)

while True:
    r, w, e = select.select([channel], [], [], 1)
    if channel in r:
        try:
            if channel.recv_ready():
                x = channel.recv(64)
            elif channel.recv_stderr_ready():
                x = channel.recv_stderr(64)
            else:
                continue

            if len(x) == 0:
                print '\r\n*** EOF\r\n',
                break
            sys.stdout.write(x)
            sys.stdout.flush()
        except socket.timeout:
            pass

which allows me to talk to the remote application with pdb: channel.set("command\n").

It works perfectly with bash, with gdb, but there is nothing I can do to get an output stream from python (v2)

How does Python handle its output stream, why my code doesn’t work with it?

Answer 1

Unless this is an academic exercise, or you have some specific requirement to use ssh, have a look at pushy. I’ve never used it but it seems mature.