组合1

#组合 1
class Hand:
    pass

class Foot:
    pass

class Trunk:
    pass

class Head:
    pass

class Person:
    def __init__(self, id_num, name):
        self.id_num = id_num
        self.name = name
        self.hand = Hand()
        self.foot = Foot()
        self.trunk = Trunk()
        self.head = Head()

p1=Person(‘111‘,‘join‘)

print(p1.__dict__)

组合2

class School:
    def __init__(self, name, addr):
        self.name = name
        self.addr = addr

class Course:
    def __init__(self, name, price, period, school):
        self.name = name
        self.price = price
        self.period = period
        self.school = school

s1 = School(‘家里蹲‘, ‘郑州‘)
s2 = School(‘市里蹲‘, ‘开封‘)

c1 = Course(‘python‘, 10, ‘10天‘, s1)
c2 = Course(‘python‘, 100, ‘100天‘, s2)
# print(c1.__dict__)
print(c1.school.name)  # 家里蹲
print(c2.school.name)  # 市里蹲
print(c1.school.addr)  # 郑州
print(c2.school.addr)  # 开封

组合例子之点课系统

# 点课系统
class School:
    def __init__(self, name, addr):
        self.name = name
        self.addr = addr

class Teacher:     # 老师应该与课程进行关联
    def __init__(self, name, gongzi,course):
        self.name = name
        self.gongzi = gongzi
        self.course=course

class Course:
    def __init__(self, name, price, period, school, teacher):  # 课程应该和学校 还有 老师进行关联
        self.name = name
        self.price = price
        self.period = period
        self.school = school
        self.teacher = teacher

s1 = School(‘家里蹲‘, ‘郑州‘)
s2 = School(‘市里蹲‘, ‘开封‘)
s3 = School(‘县里蹲‘, ‘兰考‘)
t1 = Teacher(‘憨憨‘, 10000, ‘python‘)
t2 = Teacher(‘玫玫‘, 1000, ‘安卓‘)
t3 = Teacher(‘浩浩‘, 100, ‘c‘)
msg = ‘‘‘
1 家里蹲 郑州校区
2 市里蹲 开封校区
3 县里蹲 兰考校区
‘‘‘
msg1 = ‘‘‘
4 憨憨    python
5 玫玫    安卓
3 浩浩    c
‘‘‘
while True:
    print(msg)
    menu = {
        ‘1‘: s1,
        ‘2‘: s2,
        ‘3‘: s3
    }
    print(msg1)
    teacher_menu = {
        ‘4‘: t1,
        ‘5‘: t2,
        ‘6‘: t3,
    }
    choice = input(‘选择学校>>>‘)
    school_obj = menu[choice]  # 获取学校信息

    name = input(‘选择课程>>>‘)
    teacher_obj = teacher_menu[name]  # 获取老师信息
    gongzi = t1.gongzi
    price = input(‘选择费用>>>‘)
    period = input(‘选择周期>>>‘)
    teacher = input(‘选择老师>>>‘)

    new_course = Course(name, price, period, school_obj, teacher_obj)

    # print(new_teacher.__dict__)
    print(‘课程【%s】属于【%s】学校 老师为 %s‘ % (new_course.teacher.course, new_course.school.name, new_course.teacher.name))
    #课程【python】属于【家里蹲】学校 老师为 憨憨

原文地址：https://www.cnblogs.com/pyhan/p/12312093.html