python object does not support item assignment
先看以下代码：
class Animal(object):
def __init__(self, name):
self.name = name
a1 = Animal("panda")
a1[age] = 12
当执行到
a1[age] = 12
报错：
Traceback (most recent call last): File “test.py”, line 13, in <module> a1[‘age’] = 12 TypeError: ‘Animal’ object does not support item assignment
说明a1对象不可这样进行赋值操作；
解决办法：
需要为类定义__setitem__方法；
class Animal(object):
def __init__(self, name):
self.name = name
def __setitem__(self, k, v):
self.k = v
def __str__(self):
return "name:%s, %s" % (self.name, self.k)
a1 = Animal("panda")
a1[age] = 12
print a1
再次执行， output:
name:panda, 12
打印name以及刚赋值的12。
