11.1组合

# 练习
# 圆环
# 属性: 记录大圆半径,小圆半径
# 实现计算面积: 圆环的面积大圆面积 - 小圆面积
# 实现计算周长 :大圆周长 +小圆周长
# from math import pi
#
#
#
# class Circle:
#     def __init__(self,r):
#         self.r = r
#
#     def area(self):
#         return self.r**2*pi
#
#
#     def perimeter(self):
#         return  2*self.r*pi
#
#
#
#
# class Ring:
#     def __init__(self, outer_r, inner_r):
#         c1=Circle(outer_r)
#         c2 = Circle(inner_r)
#         self.outer_r = c1  # 大圆半径
#         self.inner_r = c2  # 小圆半径
#         # print('self.outer_r',self.outer_r)
#         # print('inner_r',self.inner_r)
#     #
#     def area(self):
#         '''面积'''
#         return self.outer_r.area() -self.inner_r.area()
#
#     def perimeter(self):
#         '''周长'''
#         return self.outer_r.perimeter() + self.inner_r.perimeter()
#
#
# r1=Ring(10,5)
# print(r1.area())
# print(r1.perimeter())


# class Student:
#     def __init__(self, name, sex, age, course):
#         self.name = name
#         self.sex = sex
#         self.age = age
#         self.course = course
#
#
#
# class Course:
#     def __init__(self,cname,period,price):
#         self.cname =cname
#         self.period =period
#         self.price = price
#
# php=Course('php','3个月',18000)
# python =Course('python','5个月',25000)
# golang = Course('go','2个月',17000)
#
# banzhang = Student('班长','男',24,'python')
# # print(banzhang.course)
#
# banzhang.course = python
# print(banzhang.course.cname)
# print(banzhang.course.price)
# print(banzhang.course.period)
#



class Student:
    def __init__(self, name, sex, age, course_name,course_period,course_price):
        self.name = name
        self.sex = sex
        self.age = age
        self.course_name = course_name
        self.course_period = course_period
        self.course_price = course_price



# banzhang = Student('班长','男',24,'python','5个月',26000)
# laoding =  Student('老丁','男',22,'java','5个月',30000)
# laozhao = Student('老赵','男',21,'python','5个月',26000)

# banzhang.course_price = 29000
# laozhao.course_price = 29000
# print(banzhang.course_price)
# print(laozhao.course_price)

# 正常这样写

# class Student:
#     def __init__(self, name, sex, age, course):
#         self.name = name
#         self.sex = sex
#         self.age = age
#         self.course = course
#
#
#
# class Course:
#     def __init__(self,cname,period,price):
#         self.cname =cname
#         self.period =period
#         self.price = price
#
# php=Course('php','3个月',18000)
# python =Course('python','5个月',25000)
# golang = Course('go','2个月',17000)
#
# banzhang = Student('班长','男',24,'python')
# laoding =  Student('老丁','男',22,'java')
# laozhao = Student('老赵','男',21,'python')
# banzhang.course = python
# laozhao.course =python
# print(banzhang.course.price)
# print(laozhao.course.price)
# python.price = 29000
#
# print(banzhang.course.price)
# print(laozhao.course.price)



class A:
    def __init__(self,name):
        self.name = name


a=A('张三 啊')
# a 是对象, 是A的对象
# a.name # 对象a的属性
print(a.name)  # a.name是个字符串
a.name.split(' ')
'张三 啊'.split(' ')