python类基础
#coding:gbk class Person(): def __init__(self,age,gender,height,weight): self.age = age self.gender = gender self.height = height self.weight = weight def run(self): print("体重为%s的人在跑步" % self.weight) deo = Person(20,'man','170cmm','70kg') deo.run()
类实例 = 类对象
函数 = 方法
一个类对象(类实例)可以调用类实例属性和类实例方法
函数 = 方法
一个类对象(类实例)可以调用类实例属性和类实例方法
类继承
#coding:gbk class Person: can_eat = True def __init__(self, age, gander): self.age = age self.gander = gander def speck(self, words): print('I said :%s' % words) def run(self): print('run') class Father(Person): def __init__(self, age, gander): Person.__init__(self, age, gander) def run(self): print('我跑不动了') class Son(Father): def __init__(self, age, gander, height): Father.__init__(self, age, gander) self.height = height def eat(self): print('我想吃糖果') son = Son(10, 'boy', '110cm') son.run() son.speck('我想吃')
1: 子类默认继承父类的类实例方法
2: 类实例属性继承需要在__init__(self)中加上
FatherClass. __init__(self)
2: 类实例属性继承需要在__init__(self)中加上
FatherClass. __init__(self)
类的方法
#coding: gbk class T: def __init__(self,name): self.name = name def ord_func(self): print('实例方法') @classmethod def class_func(cls): print('类方法') @staticmethod def static_func(): print('静态方法') f = T('jack') f.ord_func() #Foo.ord_func(f) T.class_func() #f.class_func() T.static_func()
继承
#coding: gbk class People: def __init__(self,name,age,weight): self.name = name self.age = age self.__weight = weight def speak(self): print('%s 说: 我 %d 岁...' %(self.name,self.age)) class Son(People): def __init__(self,name,age,weight,grade): super(Son,self).__init__(name=name,age=age,weight=weight) #等同于People.__init__(self, name, age, weight)
##使用super()函数!最常见的就是通过super调用父类的实例化方法__init__
! 语法:super(子类名, self).方法名()
,需要传入的是子类名和self,调用的是父类里的方法,按父类的方法需要传入参数
self.grade = grade def speak(self): print("%s 说: 我 %d 岁了,我在读 %d 年级" % (self.name, self.age, self.grade)) s = Son('jacky',18,100,2) s.speak()