Python面向对象类继承和组合实例分析
本文实例讲述了Python面向对象类继承和组合。分享给大家供大家参考，具体如下：
在python3中所有类默认继承object,凡是继承了object的类都成为新式类，以及该子类的子类Python3中所有的类都是新式类，没有集成object类的子类成为经典类(在Python2中没有集成object的类以及它的子类都是经典类
继承式用来创建新的类的一种方式，好处是减少重复代码
classPeople:
def__init__(self,name,age):
self.name=name
self.age=age
defwalking(self):
print('%siswalking'%self.name)
deftalking(self):
print('%sistalking'%self.name)
classTeacher(People):
pass
classStudent(People):
pass
t1=Teacher('egon',18)
print(t1.name,t1.age)
t1.walking()
t1.talking()
s1=Student('xiaobai',22)
print(s1.name,s1.age)
s1.talking()
s1.walking()
执行结果
egon18
egoniswalking
egonistalking
xiaobai22
xiaobaiistalking
xiaobaiiswalking
classPeople:
def__init__(self,name,age,sex):
self.name=name
self.age=age
self.sex=sex
defwalking(self):
print('%siswalking'%self.name)
deftalking(self):
print('%sistalking'%self.name)
classTeacher(People):
def__init__(self,name,age,sex,level,salary):
People.__init__(name,age,sex)
self.level=level
self.salary=salary
defteaching(self):
People.talking(self)
print('%sisteaching'%self.name)
classStudent(People):
def__init__(self,name,age,sex,group):
People.__init__(name,age,sex)
self.group=group
defstudying(self):
People.talking(self)
print('%sisstudying'%self.name)
组合
classDate:
def__init__(self,year,mon,day):
self.year=year
self.mon=mon
self.day=day
deftell_birth(self):
print('出生于<%s>年<%s>月<%s>日'%(self.year,self.mon,self.day))
classTeacher:
def__init__(self,name,age,sex,year,month,day):
self.name=name
self.age=age
self.sex=sex
self.birth=Date(year,month,day)
defteaching(self):
print('%sisteaching'%self.name)
classStudent:
def__init__(self,name,age,sex,year,mon,day):
self.name=name
self.age=age
self.sex=sex
self.birth=Date(year,mon,day)
defstudying(self):
print('%sisstudying'%self.name)
xiaobai=Student('xiaobai',22,'male','1995','3','16')
xiaobai.birth.tell_birth()
执行结果
出生于<1995>年<3>月<16>日
继承和组合
classPeople:
def__init__(self,name,age,sex,year,mon,day):
self.name=name
self.age=age
self.sex=sex
self.birth=Date(year,mon,day)
defwalking(self):
print('%siswalking'%self.name)
deftalking(self):
print('%sistalking'%self.name)
classDate:
def__init__(self,year,mon,day):
self.year=year
self.mon=mon
self.day=day
deftell_birth(self):
print('出生于<%s>年<%s>月<%s>日'%(self.year,self.mon,self.day))
classTeacher(People):
def__init__(self,name,age,sex,level,salary,year,mon,day):
People.__init__(self,name,age,sex,year,mon,day)
self.level=level
self.salary=salary
defteaching(self):
People.talking(self)
print('%sisteaching'%self.name)
classStudent(People):
def__init__(self,name,age,sex,year,mon,day,group):
People.__init__(self,name,age,sex,year,mon,day)
self.group=group
defstudying(self):
People.talking(self)
print('%sisstudying'%self.name)
父类要限制
1、子类必须有父类的方法
2、子类实现的方法必须跟父类的方法的名字一样
importabc classFile(metaclass=abc.ABCMeta): @abc.abstractclassmethod defread(self): pass @abc.abstractclassmethod defwrite(self): pass
更多关于Python相关内容感兴趣的读者可查看本站专题：《Python面向对象程序设计入门与进阶教程》、《Python数据结构与算法教程》、《Python函数使用技巧总结》、《Python字符串操作技巧汇总》、《Python编码操作技巧总结》及《Python入门与进阶经典教程》
希望本文所述对大家Python程序设计有所帮助。