code: def tunnel_open(self):
          ''' Open tunnel '''
          if (self.server.is_server_running() == 'no' or
                  self.server.is_server_running() == 'maybe'):
              print("Error: Sorry, you need to have the server running to open a "
                    "tunnel.  Try 'server on' first.")
          else:
              self.tunnel.open(f tunnel_open(self):
          ''' Open tunnel '''
          if (self.server.is_server_running() == 'no' or
                  self.server.is_server_running() == 'maybe'):
              print("Error: Sorry, you need to have the server running to open a "
                    "tunnel.  Try 'server on' first.")
          else:
              self.tunnel.open()
docs: Open tunnel