Python - Server listening from two UDP sockets

Question

Im new in Python. And I can't make the server listen to two ports at the same time. This is the code I have written until now:

sock_client1 = socket.socket(socket.AF_INET,    # Internet
                     socket.SOCK_DGRAM)         # UDP
sock_client1.bind((SEND_IP, SEND_CLIENT_PORT))
sock_client1.setblocking(0)     

sock_client2 = socket.socket(socket.AF_INET,    # Internet
                     socket.SOCK_DGRAM)         # UDP
sock_client2.bind((SEND_IP, SEND_SERVER_PORT))
sock_client2.setblocking(0)             

while True:
try:

    ready_client1 = select.select([sock_client1], [], [], None)
    ready_client2 = select.select([sock_client2], [], [], None)

    if ready_client1[0]:

        pkt_recv_raw, addr = sock_client1.recvfrom(4096)
        port = SEND_CLIENT_PORT

    if ready_client2[0]:

       pkt_recv_raw, addr = sock_client2.recvfrom(4096)
       port = SEND_SERVER_PORT

When I run this code together with a client, the server can't receive anything. It just works when I use only one of the ready_client's.

Thanks in advance!

Answer 1

 ready_client1 = select.select([sock_client1], [], [], None) ready_client2 = select.select([sock_client2], [], [], None) 

Try using a single select :

ready_read, ready_write, exceptional = select.select(
    [sock_client1, sock_client2], [], [], None)


for ready in ready_read:
    pkt_recv_raw, addr = ready.recvfrom(4096)
...