code: def test_inference_no_pre(self):
      housing_file = "./data_storage/datasets/housing.csv"
      json_input = "./data_storage/json/without_preprocessor.json"
      inference_file = (
          "./data_storage/datasets/inference-data/inference-input.csv"
      )
      output_location = (
          "./data_storage/datasets/inference-data/inference-output.csv"
      )
      simple = Polymer(housing_file)
      value = simple.run(json_input, perform_PCA=False)
      if os.path.exists(output_location):
          os.remove(output_location)
      result = value.get_results(
          inference_file, output_file_path=output_location
      )
      valid = "ocean_proximity" in result
      output_saved = os.path.exists(output_location)
      self.assertTrue(valid and output_saved)
  
file_path: nylon/tests/tests.py
imports: import os, sys
  from nylon.query import Polymer
  import unittest
label_desc: Use image node_id 14 for calling the TestQueries obj's underlying member method code with example usage: obj.test_inference_no_pre() without return types