code: def diff_config(jaide, second_host, mode):
      
      try:
          # create a list of all the lines that differ, and merge it.
          output = '\n'.join([diff for diff in
                              jaide.diff_config(second_host, mode.lower())])
      except errors.SSHError:
          output = color('Unable to connect to port %s on device: %s\n' %
                         (str(jaide.port), second_host), 'red')
      except errors.AuthenticationError:  # NCClient auth failure
          output = color('Authentication failed for device: %s' %
                         second_host, 'red')
      except AuthenticationException:  # Paramiko auth failure
          output = color('Authentication failed for device: %s' %
                         second_host, 'red')
      except SSHException as e:
          output = color('Error connecting to device: %s\nError: %s' %
                         (second_host, str(e)), 'red')
      except socket.timeout:
          output = color('Timeout exceeded connecting to device: %s' %
                         second_host, 'red')
      except socket.gaierror:
          output = color('No route to host, or invalid hostname: %s' %
                         second_host, 'red')
      except socket.error:
          output = color('The device refused the connection on port %s, or '
                         'no route to host.' % jaide.port, 'red')
      if output.strip() == '':
          output = color("There were no config differences between %s and %s\n" %
                         (jaide.host, second_host), 'yel')
      else:
          # color removals red, and additions green
          return color_diffs(output)
      return output
docs: Perform a show | compare with some set commands.
  
      @param jaide: The jaide connection to the device.
      @type jaide: jaide.Jaide object
      @param second_host: The device IP or hostname of the second host to
                        | compare with.
      @type second_host: str
      @param mode: How to compare the configuration, either in 'set' mode or
                 | 'stanza' mode.
      @type mode: str
  
      @returns: The comparison between the two devices.
      @rtype str