code: def send_msg(self, connection, data):
          
          # serialize as JSON
          msg = json.dumps(data)
          # Prefix each message with a 4-byte length (network byte order)
          msg = struct.pack('>I', len(msg)).decode() + msg
          connection.sendall(msg.encode())
          return
docs: Function to send messages
          
          Parameters
          ----------
          connection: socket or connection
          data: data that can be serialized to json