code: def _check_metrics(self, metrics, params={}):
      self.assertEqual(
          metrics["num_errors"],
          0,
          msg="Failed case %s. Results %s" % (params, metrics),
      )
  
imports: import itertools
  import unittest
  from distutils.version import StrictVersion
  import numpy
  import pandas
  import pytest
  from coremltools._deps import _HAS_SKLEARN, _SKLEARN_VERSION
  from coremltools.models.utils import _is_macos, _macos_version, evaluate_classifier
label_desc: Use image node_id 1 for calling the RandomForestClassificationBostonHousingScikitNumericTest obj's underlying member method code with example usage: obj._check_metrics(metrics, params) without return types