随便写写

# _*_ coding: utf-8 _*_
__author__ = 'pythonwu'
__date__ = "2019/1/4 18:06"

#鸭子类型
class Duck(object):
    def quack(self):
        print('quack')


class Bird(object):
    def quack(self):
        print('bird imitate duck')


def in_the_same(duck):
    duck.quack()


duck = Duck()
bird = Bird()

for x in [duck,bird]:
    in_the_same(x)


import math

class Point(object):
    def __init__(self,x,y):
        self.x  =  x
        self.y = y

    def __sub__(self, other):
        return  Point(self.x- other.x ,self.y - other.y)

    def __add__(self, other):
        return Point(self.x+other.x,self.y+other.y)

    @property
    def xy(self):
        return (self.x,self.y)

    def __str__(self):
        return str(self.xy)


class Shape(object):
    def __init__(self,points_list):
        for point in points_list:
            assert isinstance(point,Point),"input must be Point type"
        self.points = []
        for point in points_list:
            self.points.append(point.xy)

    @property
    def area(self):
        return 0

    def __bool__(self):
        return self.area >0

    def __lt__(self, other):
        return self.area < other.area

    def __gt__(self, other):
        return self.area > other.area

class RectAngle(Shape):
    def __init__(self,start_p,w,h,**kwargs):
        self.w = w
        self.h = h
        self.start_p = start_p
        super(RectAngle,self).__init__([start_p,start_p+Point(w,0),start_p+Point(w,h),start_p+Point(0,h)])


    @property
    def area(self):
        return self.w*self.h

    def __contains__(self, point):
        return (point.x <= self.start_p.x +self.w and point.x >= self.start_p.x) and (point.y <= self.start_p.y +self.h and point.y> self.start_p.y)

start_p = Point(50,60)
a = RectAngle(start_p,100,80)

print(start_p in a )

print(a.points)

A = {'name':'xiaowang','age':'15'}
# print(A.name)

class A(object):
    def __init__(self,name,age):
        self.name = name
        self.age = age

    def __getattr__(self, attr):
        if self.__dict__.get('attr',None) is None:
            return self.__dict__.get('_' +attr ,None)
        else:
            return self.__dict__.get(attr,None)

    def __setattr__(self, attr, value):
        if attr in ['name','age']:
            if value <0 :
                self.__dict__['_' +attr] = 0
            else:
                self.__dict__['_'+ attr] = value
        else:
            self.__dict__[attr] = value
a = A(1,2)
print(a.name)