code: def main():
      
  
      print("Python version %s" % sys.version)
  
      print("Testing compatibility for function defined with *args")
      test_func_args(func_old_args)
      test_func_args(func_new)
  
      print("Testing compatibility for function defined with **kwargs")
      test_func_kwargs(func_old_kwargs)
      test_func_kwargs(func_new)
  
      print("All tests successful - we can change *args and **kwargs to' \
            ' named args.")
      return 0
docs: Main function calls the test functs