python中super出现的TypeError: must be type, not classobj 原因及解决

执行一下代码，出现错误，TypeError: must be type, not classobj

class A():
def __init__(self):
print("Enter A")
print("Leave A")

class B(A):
def __init__(self):
print("Enter B")
super(B, self).__init__()
print("Leave B")

class C(A):
def __init__(self):
print("Enter C")
super(C, self).__init__()
print("Leave C")

class D(A):
def __init__(self):
print("Enter D")
super(D, self).__init__()
print("Leave D")

class E(B, C, D):
def __init__(self):
print("Enter E")
super(E, self).__init__()
print("Leave E")

E()
输出错误：
Traceback (most recent call last):
File "F:/test5.py", line 35, in <module>
E()
File "F:/test5.py", line 32, in __init__
super(E, self).__init__()
TypeError: must be type, not classobj

百度之后发现，python中super只能应用于新类，而不能应用于经典类
见：http://blog.csdn.net/andos/article/details/8973368

使用新式类（即A继承自object）后正常。