使用python的AES加密算法，导入Crypto.Cipher模块后，为何调用时找不到dencrypt，请求坛子里的高手帮忙看看
from Crypto.Cipher import AES

key = 'F74E66709E1C4647323DBEA92412411E'
obj = AES.new(key, AES.MODE_ECB)
msg = obj.encrypt('F74E66709E1C4647323DBEA92412411EF74E66709E1C4647323DBEA92412411E')
print msg
msg1 = obj.dencrypt(msg)

运行结果：
加密的值：???ET_?DVn??etQ???'?\?_?íS':?3???ET_?DVn??etQ???'?\?_?íS':?3è

Traceback (most recent call last):
File "C:/Users/l00218385/Desktop/iLearning/test.py", line 12, in <module>
msg1 = obj.dencrypt(msg)
AttributeError: AESCipher instance has no attribute 'dencrypt'

问题1:为什么加密后的值是乱码?
问题2：AESCipher instance has no attribute 'dencrypt'，这个如何解决？

python新手，请高收指点，不胜感激
[解决办法]
错别字dencrypt -> decrypt。密文不是给人看的吧，print repr(msg)舒服点...