code: def setup_multi_ruleset_classifier(rule_selection_method):
      ruleset_pos = utilities.create_numerical_test_ruleset_pos()
      ruleset_neg = utilities.create_numerical_test_ruleset_neg()
      classifier = RuleSetClassifier(
          [ruleset_pos, ruleset_neg],
          rule_selection_method=rule_selection_method,
          confidence_metric=ConfidenceMetric.LAPLACE,
          weight_metric=WeightMetric.CONFIDENCE,
      )
      X, y = utilities.create_numerical_test_data(20)
      classifier.update_rules_with_metrics(X, y)
      return classifier
  
file_path: AIX360/tests/rule_induction/trxf/classifier/test_ruleset_classifier.py
imports: from unittest import TestCase
  from aix360.algorithms.rule_induction.trxf.classifier.ruleset_classifier import RuleSetClassifier, RuleSelectionMethod, ConfidenceMetric, WeightMetric
  from tests.rule_induction.trxf import utilities
label_desc: Use image node_id 1 for calling a global function with example usage: setup_multi_ruleset_classifier(rule_selection_method) and returns: classifier