Question

For some reason I cannot match select sockets to my dictionary of sockets. The below code creates a dictionary of sockets (which is does) then when someone connects accept (which it doesn’t). It finds ‘s’ in ‘L’, but then cannot socket.error: [Errno 22] Invalid argument

listening = {}
L = []
for link in links:
    try:
        # listening
        listening[link] = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
        listening[link].bind((host, routers[routername].baseport+links[link].locallink))
        listening[link].listen(backlog)
        # append routes and listen-list
        L.append(listening[link])
    except socket.error, (value,message):
        print "Could not open socket: " + message
        sys.exit(1)

# run loop
input = L
running = 1
while running:
    inputready,outputready,exceptready = select.select(input,[],[], 0)

    # Sockets loop
    for s in inputready:
        if s in L:
            # handle the server socket
            client, address = s.accept()
            input.append(client)

Answer 1

Although unsure of all my wrongs in the first attempt, I have since solved my own dilema. @Jeremy was on the right track, but slightly off (probably due to my description). The sockets don’t get referenced outside of s and therefore do not need to be a dictionary. However, select only takes a list so rather than complicating things with other data types, stick with a list and reference s instead of L (s is what you want anyways)

L = []
input = [sys.stdin]

for i in range(4):
    server = socket.socket(socket.AF_INET, socket.SOCK_STREAM) 
    server.bind((host,port+i)) 
    server.listen(backlog)
    L.append(server)
    input.append(server)

running = 1
print len(L)
while running: 
    inputready,outputready,exceptready = select.select(input,[],[]) 

    for s in inputready: 
        if s in L: 
            # handle the server socket
            print "opened"
            client, address = s.accept() 
            input.append(client)
        elif s == sys.stdin: 
            # handle standard input 
            junk = sys.stdin.readline() 
            running = 0 
        else: 
            # handle all other sockets 
            data = s.recv(size)