class Hoge(object):
def __init__(self, a={}):
self.a = a
x = Hoge()
y = Hoge()
x.a[0] = 1
y.a[1] = 2
print y.a
Y2xhc3MgSG9nZShvYmplY3QpOgogICAgZGVmIF9faW5pdF9fKHNlbGYsIGE9e30pOgogICAgICAgIHNlbGYuYSA9IGEKIAp4ID0gSG9nZSgpCnkgPSBIb2dlKCkKeC5hWzBdID0gMQp5LmFbMV0gPSAyCnByaW50IHkuYQ==