Python面向对象编程

灰太狼 2022-06-15 12:11 308阅读 0赞

类

class Person:
    	pass
    
    p = Person()
    print(p)

方法

class Person:
    	def say_hi(self):
    		print('Hello Person class')
    
    p = Person()
    p.say_hi()

\_\_init\_\_ 方法

class Person:
    	def __init__(self,name):
    		self.name = name
    	def say_hi(self):
    		print('Hello,my name is',self.name)
    
    p = Person('Shanrui')
    p.say_hi()

变量

# coding=UTF-8
    class Robot:
        population = 0
    
        def __init__(self,name):
            self.name = name
            print('(Initiallizing {})'.format(self.name))
            Robot.population += 1
    
        def die(self):
            print('{} is being destroyed!'.format(self.name))
    
            Robot.population -= 1
    
            if Robot.population == 0:
                print('{} was the last one.'.format(self.name))
            else:
                print('There are still {:d} robots working.'.format(Robot.population))
    
        def say_hi(self):
            print('Greetins ,my masters call me{}.'.format(self.name))
    
        @classmethod
        def how_many(cls):
            print('We have {:d} robots'.format(cls.population))
    
    d1 =  Robot('r1');
    d1.say_hi()
    Robot.how_many()
    
    d2 = Robot('r2')
    d2.say_hi()
    Robot.how_many()
    
    print('\nRobots can do some work here.\n')
    
    d1.die()
    d2.die()
    
    Robot.how_many()

继承

# coding=UTF-8
    
    class SchoolMember:
        def __init__(self,name,age):
            self.name = name
            self.age = age
            print('(Initialized SchoolMember:{})'.format(self.name))
        def tell(self):
            print('Name:{} Age:{}'.format(self.name,self.age),end = ' ')
    
    class Teacher(SchoolMember):
        def __init__(self,name,age,salary):
            SchoolMember.__init__(self,name,age)
            self.salary = salary
        def tell(self):
            SchoolMember.tell(self)
            print('Salary: {:d}'.format(self.salary))
    
    class Student(SchoolMember):
        def __init__(self,name,age,marks):
            SchoolMember.__init__(self,name,age)
            self.marks = marks
            print('Intialized Student:{}'.format(self.name))
        def tell(self):
            SchoolMember.tell(self)
            print('Marks : {:d}'.format(self.marks))
    
    
    t = Teacher('Mrs.Shanrui',40,5000)
    s = Student('Weiwei',25,98)
    
    print()
    
    members = [t,s]
    
    for  member in members:
        member.tell()