code: def operational(ctx, commands, format, xpath):
      
      mp_pool = multiprocessing.Pool(multiprocessing.cpu_count() * 2)
      for ip in ctx.obj['hosts']:
          mp_pool.apply_async(wrap.open_connection, args=(ip,
                              ctx.obj['conn']['username'],
                              ctx.obj['conn']['password'],
                              wrap.command, [commands, format, xpath],
                              ctx.obj['out'],
                              ctx.obj['conn']['connect_timeout'],
                              ctx.obj['conn']['session_timeout'],
                              ctx.obj['conn']['port']), callback=write_out)
      mp_pool.close()
      mp_pool.join()
docs: Execute operational mode command(s).
  
      This function will send operational mode commands to a Junos
      device. jaide.utils.clean_lines() is used to determine how we are
      receiving commands, and ignore comment lines or blank lines in
      a command file.
  
      @param ctx: The click context paramter, for receiving the object dictionary
                | being manipulated by other previous functions. Needed by any
                | function with the @click.pass_context decorator.
      @type ctx: click.Context
      @param commands: The op commands to send to the device. Can be one of
                     | four things:
                     |    1. A single op command as a string.
                     |    2. A string of comma separated op commands.
                     |    3. A python list of op commands.
                     |    4. A filepath of a file with op commands on each
                     |         line.
      @type commands: str
      @param format: String specifying what format to request for the
                   | response from the device. Defaults to 'text', but
                   | also accepts 'xml'.
      @type format: str
      @param xpath: An xpath expression on which we should filter the results.
                  | This enforces 'xml' for the format of the response.
      @type xpath: str
  
      @returns: None. Functions part of click relating to the command group
              | 'main' do not return anything. Click handles passing context
              | between the functions and maintaing command order and chaining.