def stddev(vals):
  filtered_values = [float(x) for x in vals if x is not None]
  if len(filtered_values) == 0:
    return None
  return math.sqrt(numpy.var(numpy.array(filtered_values)))
Keyword arguments for create() should pass to Field.__init__.
dataset/ETHPy150Open jansel/opentuner/opentuner/utils/stats_matplotlib.py/stddev--crossover with--dataset/ETHPy150Open rbarrois/mpdlcd/tests/test_display_fields.py/FieldRegistryTestCase.test_create_kwargs