我有两个班级：
class A(object):
"""Instance of this class must by only one"""
def some_function(self):
print "A function"
[... other functions ...]
class B(object):
"""Many instances of this class"""
[... functions ...]
我想从B类只初始化一个A类对象，我写这个：
class B(object):
a_instance = A()
b_instances = []
def __init__(self, *args, **kwargs):
B.a_instance.some_function()
B.b_instances.append(self)
super(B, self).__init__(*args, **kwargs)
def update(self):
print "Update instance"
@classmethod
def super_function(self):
print "My super B function"
for instance in B.b_instances:
instance.update()
这是对的吗？
第二个问题：如何从A类实例中调用“super_function”？