code: def _ljust(expr, width, fillchar=' '):
      
      return _string_op(expr, Ljust, _width=width, _fillchar=fillchar)
docs: Filling right side of strings in the sequence or scalar with an additional character.
      Equivalent to str.ljust().
  
      :param expr:
      :param width: Minimum width of resulting string; additional characters will be filled with `fillchar`
      :param fillchar: Additional character for filling, default is whitespace.
      :return: sequence or scalar