python中__getitem__, __setitem__, __delitem__的使用

#Python __doc__
class C(object):
""" Holy Shit What The Fuck """
def __init__(self):
self.value = {}
self.name = 'WuPeiQi'

def __getitem__(self, item):
print '__getitem__', item
return self.value[item]

def __setitem__(self, key, value):
print '__setitem__', key, value
self.value[key] = value

def __delitem__(self, key):
print '__delitem__', key
del self.value[key]
def __len__(self):
return len(self.value)

print C.__doc__

c = C()
#print c
#result = c['k1']
c['k2'] = 5
c['k1'] = "Hello"
print c['k2']
print len(c)