code: def print_err(*args, **kwargs):
      
      if kwargs.get('file', None) is None:
          kwargs['file'] = sys.stderr
  
      color = dict_pop_or(kwargs, 'color', True)
      # Use color if asked, but only if the file is a tty.
      if color and kwargs['file'].isatty():
          # Keep any Colr args passed, convert strs into Colrs.
          msg = kwargs.get('sep', ' ').join(
              str(a) if isinstance(a, C) else str(C(a, 'red'))
              for a in args
          )
      else:
          # The file is not a tty anyway, no escape codes.
          msg = kwargs.get('sep', ' ').join(
              str(a.stripped() if isinstance(a, C) else a)
              for a in args
          )
      newline = dict_pop_or(kwargs, 'newline', False)
      if newline:
          msg = '\n{}'.format(msg)
      print(msg, **kwargs)
docs: A wrapper for print() that uses stderr by default.