python基础学习（十一）

22.类

# 类 class
# 实例  实体 instance
class student:
    # 空语句 保持结构的完整性
    pass
jack = student()
jack.name = "song ke"
print(jack.name)

pony = student()
pony.name = "pony"
print(pony.name)

run结果：

 23.构造函数

# 构造函数  constructor
class student:
    # 声明构造函数  系统调用的
    def __init__(self, name, age, sex):
        self.name = name
        self.age = age
        self.sex = sex
        print("__init__  is  run")


jack = student("jack.a", 21, "男")
pony = student("pony.b", 22, "女")

print(jack.name, jack.age, jack.sex)
print(pony.name, pony.age, pony.sex)

run结果：