code: def setup(self, numba_flag):
      self.data = np.random.randn(10000, 1000)
      if numba_flag:
          self.circstd = _circular_standard_deviation
      else:
          self.circstd = circstd
  
imports: import numpy
  from scipy.stats import circstd
  import arviz
  from arviz.stats.density_utils import _fast_kde_2d, histogram, kde
  from arviz.stats.stats_utils import _circular_standard_deviation, stats_variance_2d
label_desc: Use image node_id 1 for calling the CircStd obj's underlying member method code with example usage: obj.setup(numba_flag) without return types