docs: def get_tag(self, tag):
          """
          ::
          
              GET /:login/machines/:id/tags/:tag
          
          :Returns: the value for a single tag
          :rtype: :py:class:`basestring`
          """
          headers = {'Accept': 'text/plain'}
          j, _ = self.datacenter.request('GET', self.path + '/tags/' + tag)
          return j