<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:

def rpc(name, dest=None, **kwargs):
    '''
    Executes the given rpc. The returned data can be stored in a file
    by specifying the destination path with dest as an argument

    .. code-block:: yaml

        get-interface-information:
            junos:
              - rpc
              - dest: /home/user/rpc.log
              - interface_name: lo0


    Parameters:
      Required
        * cmd:
          The rpc to be executed. (default = None)
      Optional
        * dest:
          Destination file where the rpc output is stored. (default = None)
          Note that the file will be stored on the proxy minion. To push the
          files to the master use the salt's following execution module: \
            :py:func:`cp.push <salt.modules.cp.push>`
        * format:
          The format in which the rpc reply must be stored in file specified in the dest
          (used only when dest is specified) (default = xml)
        * kwargs: keyworded arguments taken by rpc call like-
            * timeout:
              Set NETCONF RPC timeout. Can be used for commands which
              take a while to execute. (default= 30 seconds)
            * filter:
              Only to be used with 'get-config' rpc to get specific configuration.
            * terse:
              Amount of information you want.
            * interface_name:
              Name of the interface whose information you want.
    '''
    ret = {'name': name, 'changes': {}, 'result': True, 'comment': ''}
    ret['changes'] = __salt__['junos.rpc'](name, dest, **kwargs)
    return ret