add example using serversocket from https://docs.python.org/2/library/socketserver.html

socketserver/TcpServer.py

@@ -0,0 +1,38 @@
+import SocketServer
+
+class MyTCPHandler(SocketServer.BaseRequestHandler):
+    """
+    The RequestHandler class for our server.
+
+    It is instantiated once per connection to the server, and must
+    override the handle() method to implement communication to the
+    client.
+    """
+
+    def handle(self):
+        # self.request is the TCP socket connected to the client
+        self.data = self.request.recv(1024).strip()
+        print("{} wrote:".format(self.client_address[0]))
+        print(self.data)
+        # just send back the same data, but upper-cased
+        self.request.sendall(self.data.upper())
+
+    # def handle(self):
+        # self.rfile is a file-like object created by the handler;
+        # we can now use e.g. readline() instead of raw recv() calls
+        # self.data = self.rfile.readline().strip()
+        # print("{} wrote:".format(self.client_address[0]))
+        # print(self.data)
+        # Likewise, self.wfile is a file-like object used to write back
+        # to the client
+        # self.wfile.write(self.data.upper())
+
+if __name__ == "__main__":
+    HOST, PORT = "localhost", 9999
+
+    # Create the server, binding to localhost on port 9999
+    server = SocketServer.TCPServer((HOST, PORT), MyTCPHandler)
+
+    # Activate the server; this will keep running until you
+    # interrupt the program with Ctrl-C
+    server.serve_forever()