本文實例講述了Python面向對象類繼承和組合。分享給大家供大家參考，具體如下：

在python3中所有類默認繼承object,凡是繼承了object的類都成為新式類，以及該子類的子類Python3中所有的類都是新式類，沒有集成object類的子類成為經典類(在Python2中沒有集成object的類以及它的子類都是經典類

繼承式用來創建新的類的一種方式，好處是減少重復代碼

class People:  def __init__(self,name,age):    self.name=name    self.age=age  def walking(self):    print('%s is walking ' %self.name)  def talking(self):    print('%s is talking '%self.name)class Teacher(People):  passclass Student(People):  passt1=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()

執行結果

egon 18
egon is walking
egon is talking
xiaobai 22
xiaobai is talking
xiaobai is walking

class People:  def __init__(self,name,age,sex):    self.name=name    self.age=age    self.sex=sex  def walking(self):    print('%s is walking ' %self.name)  def talking(self):    print('%s is talking '%self.name)class Teacher(People):  def __init__(self,name,age,sex,level,salary):    People.__init__(name,age,sex)    self.level=level    self.salary=salary  def teaching(self):    People.talking(self)    print('%s is teaching'%self.name)class Student(People):  def __init__(self,name,age,sex,group):    People.__init__(name,age,sex)    self.group=group  def studying(self):    People.talking(self)    print('%s is studying'%self.name)

組合

class Date:  def __init__(self,year,mon,day):    self.year=year    self.mon=mon    self.day=day  def tell_birth(self):    print('出生于<%s>年 <%s>月 <%s>日'%(self.year,self.mon,self.day))class Teacher:  def __init__(self,name,age,sex,year,month,day):    self.name=name    self.age=age    self.sex=sex    self.birth=Date(year,month,day)  def teaching(self):    print('%s is teaching'%self.name)class Student:  def __init__(self,name,age,sex,year,mon,day):    self.name=name    self.age=age    self.sex=sex    self.birth=Date(year,mon,day)  def studying(self):    print('%s is studying'%self.name)xiaobai=Student('xiaobai',22,'male','1995','3','16')xiaobai.birth.tell_birth()

執行結果

出生于<1995>年 <3>月 <16>日

繼承和組合

class People:  def __init__(self,name,age,sex,year,mon,day):    self.name=name    self.age=age    self.sex=sex    self.birth=Date(year,mon,day)  def walking(self):    print('%s is walking ' %self.name)  def talking(self):    print('%s is talking '%self.name)class Date:  def __init__(self,year,mon,day):    self.year=year    self.mon=mon    self.day=day  def tell_birth(self):    print('出生于<%s>年 <%s>月 <%s>日'%(self.year,self.mon,self.day))class Teacher(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  def teaching(self):    People.talking(self)    print('%s is teaching'%self.name)class Student(People):  def __init__(self,name,age,sex,year,mon,day,group):    People.__init__(self,name,age,sex,year,mon,day)    self.group=group  def studying(self):    People.talking(self)    print('%s is studying'%self.name)