python笔记：2.1.5特性（属性）

# -*- coding: utf-8 -*-
"""
Created on Tue May 14 11:01:33 2019

@author: User
"""

class Human(object):
    
    domain = 'eukarya'
    def __init__(self, kingdom='Animalia',phylum='Chordata',
                order='Primates',family='Human Being'):
        self.kingdom = kingdom
        self.phylum=phylum
        self.__order = order
        self.family = family
    
    def typewrite(self):
        print('This is %s typing words!' %self.family)
    def add(self, n1, n2):
        n = n1 + n2
        print(str(n1) + '+' + str(n2) + '+' + str(n))
        print('You see! %s can calculate!' %self.family)
        
    @classmethod
    def showclassmethodinfo(cls):
        print(cls.__name__) #__name__属性，其值为类名
        print(dir(cls))    #使用dir列示本类的所有方法

        
class Male(Human):
    def __init__(self,gender='male'):
        super(Male,self).__init__() #
        self.gender=gender
    def less(self, n1, n2):
        '''为子类增加一个名为less的方法'''
        n = n1 - n2
        print(str(n1) + '-' + str(n2) + '=' + str(n))
        print('你看，%s 可以计算！' %self.gender)
    def add(self, n1, n2):
        '''为子类重新定义add方法'''
        n = n1 - n2
        print(str(n1) + '-' + str(n2) + '=' + str(n))
        print('你看，%s 不能使用加法计算！' %self.gender)
    def showclassmethodinfo(self):
        print("这是 Male 的class method 信息：")
        super(Male,self).showclassmethodinfo()
        print("\n这是 Male 的 instance method 信息:")
        print(dir(self))
        
class Female(Human):
    def __init__(self,gender='female', age = 18):
        super(Female,self).__init__() #
        self.gender=gender
        self.age = age
        
    def get_age(self):
        return self.age
    
    def set_age(self, age_value):
        if not isinstance(age_value, int):
            raise ValueError('年龄必须为整数型')
        if age_value < 0:
            raise ValueError('年龄必须大于等于0')
        if age_value > 150:
            raise ValueError('年龄必须小于等于150')
        self.age = age_value
    
    def add(self, n1, n2):
        '''为子类重新定义add方法'''
        n = n1 - n2
        print(str(n1) + '-' + str(n2) + '=' + str(n))
        print('你看，%s 不能使用加法计算！' %self.gender)
        
    def div(self, n1, n2):
        n = n1 / n2
        print(str(n1) + '/' + str(n2) + '=' + str(n))
        print('你看，%s 能使用除法计算！' %self.gender)       

MissZhang = Female()
print(MissZhang.age)

MissZhang.age = 234
print(MissZhang.age)

MissChen = Female()
MissChen.set_age(27)
print(MissChen.age)

MissChen.set_age(227)
print(MissChen.age)

运行：

18
234
27
Traceback (most recent call last):

  File "<ipython-input-94-df7b0d7502f5>", line 1, in <module>
    runfile('D:/0python/2.1.5特性_0514.py', wdir='D:/0python')

  File "C:\ProgramData\Anaconda3\lib\site-packages\spyder_kernels\customize\spydercustomize.py", line 786, in runfile
    execfile(filename, namespace)

  File "C:\ProgramData\Anaconda3\lib\site-packages\spyder_kernels\customize\spydercustomize.py", line 110, in execfile
    exec(compile(f.read(), filename, 'exec'), namespace)

  File "D:/0python/2.1.5特性_0514.py", line 90, in <module>
    MissChen.set_age(227)

  File "D:/0python/2.1.5特性_0514.py", line 66, in set_age
    raise ValueError('年龄必须小于等于150')

ValueError: 年龄必须小于等于150