Python Network Programming

How to do it...

If you run a Python socket server on a specific port and try to rerun it after closing it once, you won't be able to use the same port. It will usually throw an error like the following command:

Traceback (most recent call last):
   File "11_10_reuse_socket_address.py",    line 40, in <module>
        reuse_socket_addr()
   File "11_10_reuse_socket_address.py",    line 25, in reuse_socket_addr
        srv.bind( ('', local_port) )
   File "<string>", line 1, in bind
    socket.error: [Errno 98] Address     already in use
  

The remedy to this problem is to enable the socket reuse option, SO_REUSEADDR.

After creating a socket object, we can query the state of address reuse, say an old state. Then, we call the setsockopt() method to alter the value of its address ...