如何使用类

类在定义阶段已经能执行

class luffystudent:
    school=‘luffycity‘
    def learn(self):
        print(‘is learning‘)
    def eat(self):
        print(‘is eating‘)
    def sleep(self):
        print(‘is sleeping‘)

》》》===run===

查看类的名称空间，print(类名.__dict__)

print(luffystudent.__dict__)

{‘__module__‘: ‘__main__‘, ‘school‘: ‘luffycity‘, ‘learn‘: <function luffystudent.learn at 0x00000000021C97B8>, ‘eat‘: <function luffystudent.eat at 0x00000000021C9840>, ‘sleep‘: <function luffystudent.sleep at 0x00000000021C98C8>, ‘__dict__‘: <attribute ‘__dict__‘ of ‘luffystudent‘ objects>, ‘__weakref__‘: <attribute ‘__weakref__‘ of ‘luffystudent‘ objects>, ‘__doc__‘: None}

类内部定义的变量是类的数据属性

类内部定义的函数是类的函数属性

#查
#print(luffystudent.school)
#print(luffystudent.learn)

#增
print(luffystudent.__dict__[‘school‘])
luffystudent.county=‘china‘
print(luffystudent.__dict__)

#删
# del luffystudent.county
# print(luffystudent.__dict__)

#改
luffystudent.school=‘LuffyCity‘
print(luffystudent.__dict__)

如何使用类

#定义类
class luffystudent:
    def __init__(self,name,sex,age):
        self.name=name
        self.sex=sex
        self.age=age


    school=‘luffycity‘
    def learn(self):
        print(‘is learning‘)
    def eat(self):
        print(‘is eating‘)
    def sleep(self):
        print(‘is sleeping‘)


#后产生对象
stu1=luffystudent(‘sunny‘,‘nan‘,‘28‘)
#实例化步骤
#1.创建一个空对象
#2.luffystudent.__init__(stu1,‘sunny‘,‘nan‘,‘28‘) 


# print(luffystudent.__init__)
# print(stu1.__dict__)
# print(stu1.name)

sty2=luffystudent(‘alex‘,‘nan‘,35)
print(sty2.__dict__)   #sty2名称空间，键是属性名，值为属性值

如何使用类

原文：https://www.cnblogs.com/sunny666/p/9629554.html