python学习之面向对象（下）

该篇主要是针对面向对象的细讲，包括类的多重继承，方法的重写，析构函数，回收机制进行讲解

#该类主要是讲述python面象对象的一些特征，包括继承，方法的重写，多态，垃圾回收

class person(object):
    name = ''
    age = ''

    def __init__(self,name,age, **kwargs):
        self.name = name
        self.age = age
        return super().__init__(**kwargs)
    
    def dosomething(self):
        print("my name is {0:} and age is {1}".format(self.name,self.age))

#__del__方法为析构函数
    def __del__(self):
      class_name = self.__class__.__name__
      print(class_name, "destroyed")



class Student(person):

    bookName = ""

    def __init__(self, book, **kwargs):
        self.bookName = book
        return super().__init__(**kwargs)

    def dosomething(self):
        print("my name is {0:} and age is {1} and learning {2}".format(self.name,self.age,self.bookName))


class company:

    companyName = ""

    def __init__(self,company, **kwargs):
        self.companyName = company
        return super().__init__(**kwargs)

    def work(self):
        print("I work in {0}".format(self.companyName))


class employee(Student,company):

    #def __init__(self, **kwargs):
    #    return super().__init__(**kwargs)
    pass;


if __name__ == "__main__":

    per = person(name='Li li',age=25)
    per.dosomething()
    
    student = Student(name="ddd",age=12,book="fdfsd")
    student.dosomething()

    jack = employee(name="airvens",age=12,book="computer",company="facebook")
    jack.dosomething()
    jack.work()

    #del student回使person调用回收方法
    del per;
    del student;
    del jack;

运行结果：

说明：

在python2.x版本中，对于__init__函数中初始化成员时有所不同

3.x 版本中的写法： super().__init__(name, age)

2.x 版本中的写法：super(class,self).__init__(name,age)