Python 實現str類型修改的方法

Python的str是不能修改的，但是我們可以通過切片操作來變相的實現插入 刪除和修改等操作。

lonfee@ubuntu:~$ pythonPython 2.7.1+ (r271:86832, Apr 11 2011, 18:05:24) [GCC 4.5.2] on linux2Type "help", "copyright", "credits" or "license" for more information.>>> a='0034'>>> a[1]='1'Traceback (most recent call last):  File "<stdin>", line 1, in <module>TypeError: 'str' object does not support item assignment>>> a=a[:1]+'1'+a[2:]>>> print a0134>>> a=a[:2]+'2'+a[2:]>>> print a01234>>>