Python面向对象 组合（选课系统示例）

# Author : Kelvin
# Date : 2019/1/15 20:44

"""
学校与老师关联
课程与老师和学校关联
"""


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

class Teacher():
    def __init__(self, name, age, gender, school):
        self.name = name
        self.age = age
        self.gender = gender
        self.school=school


class Course():
    def __init__(self, name, time, school, teacher):
        self.name = name
        self.time = time
        self.school = school
        self.teacher = teacher


s1 = School("大庆师范学院", "计算机专业")
s2 = School("大庆师范学院", "生物工程专业")
s3 = School("大庆师范学院", "外国语专业")

t1 = Teacher("kelvin", 22, "male", s1)
t2 = Teacher("alex", 23, "male", s3)
t3 = Teacher("jam", 25, "female", s2)


msg1="""
学校选项：
1:"大庆师范学院", "计算机专业"
2:"大庆师范学院", "生物工程专业"
3:"大庆师范学院", "外国语专业"
"""
msg2="""
教师选项：
1:"kelvin", 22, "male", "大庆师范学院", "计算机专业"
2:"alex", 23, "male", "大庆师范学院", "外国语专业"
3:"jam", 25, "female","大庆师范学院", "生物工程专业"
"""
while True:
    print(msg1)
    choice1 = input("请选择学校专业：")
    s = {
        "1": s1,
        "2": s2,
        "3": s3
    }
    if choice1 in s:
        sx = s[choice1]
    else:
        print("专业选择异常，请重试！")
        break

    print(msg2)
    choice2 = input("请选择老师：")
    t = {
        "1": t1,
        "2": t2,
        "3": t3
    }
    if choice2 in t:
        tx = t[choice2]
    else:
        print("教师选择异常，请重试！")
        break
    course_name = input("请输入课程名：")
    course_time = input("请输入课程时长：")
    new_course = Course(course_name, course_time, sx, tx)
    print("选课成功！  [%s]课程所属的学校是[%s]专业是[%s]   老师名字[%s]年龄[%s]性别[%s]所属学校[%s]专业[%s]  课程时长：[%s]" % (
        new_course.name, new_course.school.name, new_course.school.profession, new_course.teacher.name,
        new_course.teacher.age, new_course.teacher.gender, new_course.teacher.school.name,new_course.teacher.school.profession,new_course.time))
    break