docs: def ping_pong(connection, command, strexp, timeout=10):
          '''
          Enter a command and wait for something to happen (enter + expect
          combined)
  
          @param connection: connection to the host
          @type connection: L{Connection}
  
          @param command: command to execute
          @type command: str
  
          @param strexp: string to convert to expression (.*string.*)
          @type strexp: str
  
          @param timeout: timeout for performing expect operation
          @type  timeout: int
  
          @return: True if succeeded
          @rtype: bool
  
          @raises ExpectFailed
          '''
          Expect.enter(connection, command)
          return Expect.expect(connection, strexp, timeout)