Day7组合

可以将那些重复的，固定的东西提出来，单独定义一个类。

例如：

 class Course:
     def __init__(self,course_name,course_period,course_price):
         self.course_name=course_name
         self.course_period=course_period
         self.course_price=course_price
     def tell_info(self):
         print('<课程名:%s 周期：%s 价格：%s>' %(self.course_name,self.course_period,self.course_price))

 python=Course('Python','6mons',3000)
 linux=Course('Lnux','3mons',2000)
 bigdata=Course('BigData','1mons',1000)

例如这种：

 class OldboyPeople:
     school = 'oldboy'
     def __init__(self,name,age,sex):
         self.name=name
         self.age=age
         self.sex=sex

     def eat(self):
         print('is eating')

 class OldboyStudent(OldboyPeople):

     def __init__(self,name,age,sex):
         OldboyPeople.__init__(self,name,age,sex)
         self.course=[]

     def learn(self):
         print('%s is learning'  %self.name)

 class OldboyTeacher(OldboyPeople):
     def __init__(self,name,age,sex,salary,title):
         OldboyPeople.__init__(self,name,age,sex)
         self.salary=salary
         self.title=title
         self.course=[]

     def teach(self):
         print('%s is teaching'  %self.name)

 class Course:
     def __init__(self,course_name,course_period,course_price):
         self.course_name=course_name
         self.course_period=course_period
         self.course_price=course_price
     def tell_info(self):
         print('<课程名:%s 周期：%s 价格：%s>' %(self.course_name,self.course_period,self.course_price))

 python=Course('Python','6mons',3000)
 linux=Course('Lnux','3mons',2000)
 bigdata=Course('BigData','1mons',1000)

 # python.tell_info()

 egon_obj=OldboyTeacher('egon',18,'male',3.1,'沙河霸道金牌讲师')
 #
 # egon_obj.course.append(python)
 # egon_obj.course.append(linux)
 #
 # for obj in egon_obj.course:
 #     obj.tell_info()

 yl_obj=OldboyStudent('yanglei',28,'female')
 yl_obj.course.append(python)

 for i in yl_obj.course:
     # print(i.course_name,i.course_period,i.course_price)
     i.tell_info()