Python2.X的cStringIO和StringIO库的用法和介绍

python3.x的相关功能已经合并到io库，参考下面链接>>>

python3.x中StringIO与BytesIO的介绍与用法
https://www.nasue.com/forum.php? ... 25787&fromuid=1
(出处: 纳速健身)



Python的StringIO库用于实现在内存缓冲区读写文件，看官方对StringIO的介绍，第一句话就是：The module implements file-like class, StingIO, that reads and writes a string buffer(also known as memory files)

cStringIO和StringIO用法相同，速度更快，常常这样使用：

1. try:
   
2.     import cStringIO as StringIO
   
3. except ImportError:
   
4.     import StringIO

复制代码

>>> output = StringIO.StringIO()
>>> output.write('At that time, I was afraid')
>>> output


<cStringIO.StringO object at 0x7fba35ffaed8>

>>> print output.getvalue()

At that time, I was afraid
>>> output.close()



但cStringIO.StringIO不能作为基类被继承；2. 创建cStringIO.StringIO对象时，如果初始化函数提供了初始化数据，新生成的对象是只读的。

>>> o2 = cStringIO.StringIO('initialization string')
>>> print o2.getvalue()

initialization string

>>> o2.write('write string')

Traceback (most recent call last):

  File "<stdin>", line 1, in <module>