string.maketrans此函数的调用

python version 3.2.2

>>> from string import maketrans
Traceback (most recent call last):
  File "<pyshell#158>", line 1, in <module>
    from string import maketrans
ImportError: cannot import name maketrans             //从string导入maketrans函数不成功

>>> table = str.maketrans('cs','kz')           //这样可以