面向对象的日常笔记

1.

# Author:Jesi
# Time : 2018/12/29 16:33
class Base(object):
    def func(self):
        super(Base,self).func()
        print("Base.func")


class Bar(object):
    def func(self):
        print("Bar.func")

class Foo(Base,Bar):
    pass

obj = Foo()
obj.func()
print(Foo.__mro__)  # super不是找父类，而是根据__mro__
'''
Bar.func
Base.func
(<class '__main__.Foo'>, <class '__main__.Base'>, <class '__main__.Bar'>, <class 'object'>)
'''

# =======================================
obj = Base()
obj.func()   # AttributeError: 'super' object has no attribute 'func'

2.偏函数

# Author:Jesi
# Time : 2018/12/29 16:23
import functools


def index(a1, a2):
    return a1 + a2


# 偏函数帮助开发者自动传递参数
new_func = functools.partial(index, 666)

ret = new_func(1)
print(ret)  # 667

3.继承

# Author:Jesi
# Time : 2018/12/29 16:27

class Base(object):
    def func(self):
        print("base.func")



class Foo(Base):
    def func(self):

        # 方式一：执行父类的func
        super(Foo,self).func()

        # 方式二：主动执行Base类的方法
        Base.func(self)

        # 执行真正的子类func
        print("Foo.func")

obj = Foo()
obj.func()