python object has no attribute '__getitem__'

class Animal(object):
        def __init__(self, name):
                self.name = name


a1 = Animal("panda")

print a1['name']

当执行

a1['name']

出现如下问题：

Traceback (most recent call last):
File “test.py”, line 19, in
print a1[‘name’]
TypeError: ‘Animal’ object has no attribute ‘getitem’

提示没有定义__gettiem__

解决办法：

为类定义__gettiem__方法；

class Animal(object):
        def __init__(self, name):
                self.name = name

        def __getitem__(self, k):
                if k == 'name':
                        return self.name


a1 = Animal("panda")

print a1['name']

再次执行，得到如下output:

panda