'Set preferences of qBittorrent.
Read all possible preferences @ http://git.io/vEgDQ
:param kwargs: set preferences in kwargs form.'

def set_preferences(self, **kwargs):

    json_data = 'json={}'.format(json.dumps(kwargs))
    headers = {'content-type': 'application/x-www-form-urlencoded'}
    return self._post('command/setPreferences', data=json_data, headers=headers)
