Python--面向对象小结

Posted 2020-10-27 xudachen

小结主要讲述面向对象的优点，可扩展性高

示例代码如下：

 1 class Chinese:
 2     def __init__(self,name,age,sex):
 3         self.name=name
 4         self.age=age
 5         self.sex=sex
 6 
 7 
 8 p1 = Chinese(‘egon‘,18,‘male‘)
 9 p2 = Chinese(‘alex‘,38,‘female‘)
10 p3 = Chinese(‘wpq‘,48,‘female‘)

我们往类中插入一个数据属性，只需在类中添加即可，对象不需做什么改动就可以访问，代码验证如下：

 1 class Chinese:
 2     country = ‘China‘
 3     def __init__(self,name,age,sex):
 4         self.name=name
 5         self.age=age
 6         self.sex=sex
 7 
 8 
 9 p1 = Chinese(‘egon‘,18,‘male‘)
10 p2 = Chinese(‘alex‘,38,‘female‘)
11 p3 = Chinese(‘wpq‘,48,‘female‘)
12 
13 print(p1.country)
14 print(p2.country)
15 print(p3.country)

结果如下：

China
China
China 证明都可以访问

插入一个函数属性，只需在类中添加即可，对象不需做什么改动就可以访问，代码验证如下：

 1 class Chinese:
 2     country = ‘China‘
 3     def __init__(self,name,age,sex):
 4         self.name=name
 5         self.age=age
 6         self.sex=sex
 7 
 8     def eat(self):
 9         print(‘%s is eating‘ % self.name)
10 
11 
12 p1 = Chinese(‘egon‘,18,‘male‘)
13 p2 = Chinese(‘alex‘,38,‘female‘)
14 p3 = Chinese(‘wpq‘,48,‘female‘)
15 
16 p1.eat()
17 p2.eat()
18 p3.eat()

结果如下：

egon is eating
alex is eating
wpq is eating