code: def _copy_flaky_attributes(cls, test, test_class):
          
          test_callable = cls._get_test_callable(test)
          if test_callable is None:
              return
          for attr, value in cls._get_flaky_attributes(test_class).items():
              already_set = hasattr(test, attr)
              if already_set:
                  continue
              attr_on_callable = getattr(test_callable, attr, None)
              if attr_on_callable is not None:
                  cls._set_flaky_attribute(test, attr, attr_on_callable)
              elif value is not None:
                  cls._set_flaky_attribute(test, attr, value)
docs: Copy flaky attributes from the test callable or class to the test.
  
          :param test:
              The test that is being prepared to run
          :type test:
              :class:`nose.case.Test`