新式类与经典类

class A():
    def __init__(self):
        print 'my name is GF'
    
    def test(self):
        print 'this is ====A====='

class B(A):
    def __init__(self):
        print 'my name is BFather'

class C(A):
    def  __init__(self):
        print 'my name is Cfather'
    
    def test(self):
        print 'this is ======C======'

class D(B,C):
    def  __init__(self):
        print 'my name is D'

t1 =D()
t1.test()

　

执行效果：
my name is D
this is ======A======

#继承关系，先找B，如果B没有则找A.(深度优先）

 

 

class A(object):
    def __init__(self):
        print 'my name is GF'
    
    def test(self):
        print 'this is ====A====='

class B(A):
    def __init__(self):
        print 'my name is BFather'

class C(A):
    def  __init__(self):
        print 'my name is Cfather'
    
    def test(self):
        print 'this is ======C======'

class D(B,C):
    def  __init__(self):
        print 'my name is D'

t1 =D()
t1.test()　　

执行结果

my name is D
this is ======C======

#继承关系，先找B，如果B没有则找C(广度优先)