python面试题之阅读下面的代码，它的输出结果是什么？
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2023-11-18 19:47:10
答案 输出结果以注释的形式表示： a.go() # go A go! b.go() # go A go! # go B go! c.go() # go A go! # go C go! d.go() # go A go! # go C go! # go B go! # go D go! e.go() ......
class a(object):
def go(self):
print "go a go!"
def stop(self):
print "stop a stop!"
def pause(self):
raise exception("not implemented")
class b(a):
def go(self):
super(b, self).go()
print "go b go!"
class c(a):
def go(self):
super(c, self).go()
print "go c go!"
def stop(self):
super(c, self).stop()
print "stop c stop!"
class d(b,c):
def go(self):
super(d, self).go()
print "go d go!"
def stop(self):
super(d, self).stop()
print "stop d stop!"
def pause(self):
print "wait d wait!"
class e(b,c): pass
a = a()
b = b()
c = c()
d = d()
e = e()
# 说明下列代码的输出结果
a.go()
b.go()
c.go()
d.go()
e.go()
a.stop()
b.stop()
c.stop()
d.stop()
e.stop()
a.pause()
b.pause()
c.pause()
d.pause()
e.pause()
答案
输出结果以注释的形式表示：
a.go() # go a go! b.go() # go a go! # go b go! c.go() # go a go! # go c go! d.go() # go a go! # go c go! # go b go! # go d go! e.go() # go a go! # go c go! # go b go! a.stop() # stop a stop! b.stop() # stop a stop! c.stop() # stop a stop! # stop c stop! d.stop() # stop a stop! # stop c stop! # stop d stop! e.stop() # stop a stop! a.pause() # ... exception: not implemented b.pause() # ... exception: not implemented c.pause() # ... exception: not implemented d.pause() # wait d wait! e.pause() # ...exception: not implemented
为什么提这个问题？
因为面向对象的编程真的真的很重要。不骗你。答对这道问题说明你理解了继承和python中super函数的用法。
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