Why am I getting the error “connection refused” in Python? (Sockets)

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Instead of 

host = socket.gethostname() #Get the local machine name
port = 12397 # Reserve a port for your service
s.bind((host,port)) #Bind to the port

you should try

port = 12397 # Reserve a port for your service
s.bind(('', port)) #Bind to the port

so that the listening socket isn’t too restricted. Maybe otherwise the listening only occurs on one interface which, in turn, isn’t related with the local network.

One example could be that it only listens to 127.0.0.1, which makes connecting from a different host impossible.

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