python错误：AttributeError: 'module' object has no attribute 'setdefaultencoding'问题的解决方法

import sys
print sys.getdefaultencoding()

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

import sys
 
sys.setdefaultencoding('utf-8')
 
print sys.getdefaultencoding()

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

import sys
 
reload(sys)
sys.setdefaultencoding('utf-8')
 
print sys.getdefaultencoding()

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