python调用基类方法

测试代码

class P(object):
    def __init__(self):
        print "calling P's constructor"

class C(P):
    def __init__(self):
        P.__init__(self)  # 硬编码显式调用
        print "calling C's constructor"

class D(C):
    def __init__(self):
        super(D,self).__init__()  # 使用super调用
        print "calling D's constructor"

print "---------p()-----------"
p=P()
print "---------c()-P()-------"
c=C()
print '---------d()-C()-------'
d=D()

输出

---------p()-----------
calling P's constructor
---------c()-P()-------
calling P's constructor
calling C's constructor
---------d()-C()-------
calling P's constructor
calling C's constructor
calling D's constructor