code: def test_ripper_wifi(self):
      data = pd.read_csv(
          "https://archive.ics.uci.edu/ml/machine-learning-databases/00422/wifi_localization.txt",
          header=None,
          delimiter="\t",
          names=["X1", "X2", "X3", "X4", "X5", "X6", "X7", "Y"],
          dtype={
              "X1": float,
              "X2": float,
              "X3": float,
              "X4": float,
              "X5": float,
              "X6": float,
              "X7": float,
              "Y": str,
          },
      )
  
      x = data.loc[:, ["X1", "X2", "X3", "X4", "X5", "X6", "X7"]]
      y = data.loc[:, "Y"]
  
      x_train, x_test, y_train, y_test = train_test_split(
          x, y, random_state=0
      )
  
      estimator = RipperExplainer(d=64, k=2, pruning_threshold=20)
  
      estimator.fit(x_train, y_train)
      dnf_rule_set_list = estimator.explain_multiclass()
      classifier = RuleSetClassifier(
          dnf_rule_set_list[:-1],
          rule_selection_method=RuleSelectionMethod.WEIGHTED_MAX,
          confidence_metric=ConfidenceMetric.LAPLACE,
          weight_metric=WeightMetric.CONFIDENCE,
          default_label="4",
      )
      classifier.update_rules_with_metrics(x_test, y_test)
      reader = TrxfReader()
      reader.load_data_dictionary(x_train)
      serializer = NyokaSerializer(TIMESTAMP)
      exporter = PmmlExporter(reader, serializer)
      with open(
          os.path.join(
              os.path.dirname(os.path.abspath(__file__)),
              "./resources/wifi.pmml",
          )
      ) as file:
          expected = file.read()
      actual = exporter.export(classifier)
  
file_path: AIX360/tests/rule_induction/trxf/pmml_export/test_pmml_exporter.py
imports: import datetime
  import os
  import sys
  from unittest import TestCase
  import pandas
  from sklearn.model_selection import train_test_split
  from aix360.algorithms.rule_induction.ripper import RipperExplainer
  from aix360.algorithms.rule_induction.ripper.ripper_ruleset_generator import RipperRuleSetGenerator
  from aix360.algorithms.rule_induction.trxf.classifier.ruleset_classifier import RuleSetClassifier, RuleSelectionMethod, WeightMetric, ConfidenceMetric
  from aix360.algorithms.rule_induction.trxf.pmml_export import NyokaSerializer
  from aix360.algorithms.rule_induction.trxf.pmml_export.pmml_exporter import PmmlExporter
  from aix360.algorithms.rule_induction.trxf.pmml_export.reader.trxf_reader import TrxfReader
  from tests.rule_induction.trxf.utilities import create_test_ruleset, DATA_FRAME
label_desc: Use image node_id 5 for calling the TestPmmlExporter obj's underlying member method code with example usage: obj.test_ripper_wifi() without return types