code: def test_file_iso_8859_1(self):
      self.check_encoding("iso-8859-1")
  
imports: import os
  import sys
  import shutil
  import tempfile
  import unittest
  import warnings
label_desc: Use image node_id 20 for calling the TestLiterals obj's underlying member method code with example usage: obj.test_file_iso_8859_1() without return types