code: def print_list(extracted_list, file=None):
      
      if file is None:
          file = sys.stderr
      for filename, lineno, name, line in extracted_list:
          _print(file,
                 '  File "%s", line %d, in %s' % (filename,lineno,name))
          if line:
              _print(file, '    %s' % line.strip())
docs: Print the list of tuples as returned by extract_tb() or
      extract_stack() as a formatted stack trace to the given file.