code: def test_preprocess_co_filename(self):
      def undecorated():
          pass
  
      decorated = preprocess()(undecorated)
  
      self.assertEqual(
          undecorated.__code__.co_filename,
          decorated.__code__.co_filename,
      )
  
imports: from operator import attrgetter
  from types import FunctionType
  from unittest import TestCase
  from nose_parameterized import parameterized
  from numpy import arange, array, dtype
  import pytz
  from six import PY3
  from zipline.utils.preprocess import call, preprocess
  from zipline.utils.input_validation import expect_dimensions, ensure_timezone, expect_element, expect_dtypes, expect_types, optional, optionally
label_desc: Use image node_id 2 for calling the PreprocessTestCase obj's underlying member method code with example usage: obj.test_preprocess_co_filename() without return types