code: def test_dd_all(self, dtype, statistic):
      def ref_statistic(x):
          return len(x) if statistic == "count" else statistic(x)
  
      rng = np.random.default_rng(3704743126639371)
      n = 10
      x = rng.random(size=n)
      i = x >= 0.5
      v = rng.random(size=n)
      if dtype is np.complex128:
          v = v + rng.random(size=n) * 1j
  
      stat, _, _ = binned_statistic_dd(x, v, statistic, bins=2)
      ref = np.array([ref_statistic(v[~i]), ref_statistic(v[i])])
      assert_allclose(stat, ref)
      assert stat.dtype == np.result_type(ref.dtype, np.float64)
  
imports: import numpy
  from numpy.testing import assert_allclose
  import pytest
  from pytest import raises
  from scipy.stats import binned_statistic, binned_statistic_2d, binned_statistic_dd
  from scipy._lib._util import check_random_state
  from .common_tests import check_named_results
label_desc: Use image node_id 45 for calling the TestBinnedStatistic obj's underlying member method code with example usage: obj.test_dd_all(dtype, statistic) and returns: unknown