mars.dataframe.Series.str.ljust# Series.str.ljust(width, fillchar=' ')# Pad right side of strings in the Series/Index. Equivalent to str.ljust(). 参数 width (int) – Minimum width of resulting string; additional characters will be filled with fillchar. fillchar (str) – Additional character for filling, default is whitespace. 返回 filled 返回类型 Series/Index of objects.