Python----面向对象--属性查找小练习
属性查找小练习:
1 class Foo: 2 def f1(self): 3 print('from Foo.f1') 4 5 def f2(self): 6 print('from Foo.f2') 7 self.f1() 8 9 10 class Bar(Foo): 11 def f2(self): 12 print('from Bar.f2') 13 14 15 b = Bar() 16 b.f2() 17 18 结果为: 19 20 from Bar.f2
稍作修改:
1 class Foo: 2 def f1(self): 3 print('from Foo.f1') 4 5 def f2(self): 6 print('from Foo.f2') 7 self.f1() 8 9 10 class Bar(Foo): 11 def f1(self): 12 print('from Bar.f2') 13 14 15 b = Bar() 16 b.f2() 17 18 结果为: 19 from Foo.f2 20 from Bar.f2
可以看出,属性的查找顺序为先从对象自身查找,然后从对象所在的类进行查找,然后从父类查找,依次查找,直至找到或者报错没有找到,