python错误：AttributeError:'module'objecthasnoattribute's

代码如下:

import sys
print sys.getdefaultencoding()

代码如下:

[root@lee ~]# python a.py
ascii

代码如下:

import sys

sys.setdefaultencoding('utf-8')

print sys.getdefaultencoding()

代码如下:

[root@lee ~]# python a.py
Traceback (most recent call last):
File "a.py", line 4, in
sys.setdefaultencoding('utf-8')
AttributeError: 'module' object has no attribute 'setdefaultencoding'
提示：AttributeError: 'module' object has no attribute 'setdefaultencoding'？

代码如下:

import sys

reload(sys)
sys.setdefaultencoding('utf-8')

print sys.getdefaultencoding()

代码如下:

[root@lee ~]# python a.py
utf-8