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

def set_hostname(name, **kwargs):
    '''
    Changes the hostname of the device.

    .. code-block:: yaml

            device_name:
              junos:
                - set_hostname
                - comment: "Host-name set via saltstack."


    Parameters:
     Required
        * hostname: The name to be set. (default = None)
     Optional
        * kwargs: Keyworded arguments which can be provided like-
            * timeout:
              Set NETCONF RPC timeout. Can be used for commands
              which take a while to execute. (default = 30 seconds)
            * comment:
              Provide a comment to the commit. (default = None)
            * confirm:
              Provide time in minutes for commit confirmation. \
              If this option is specified, the commit will be rollbacked in \
              the given time unless the commit is confirmed.

    '''
    ret = {'name': name, 'changes': {}, 'result': True, 'comment': ''}
    ret['changes'] = __salt__['junos.set_hostname'](name, **kwargs)
    return ret