2018-10-09简单的学生管理系统

(学生管理系统简易版)

用一个变量来保存一个班级的学生信息，学生信息包括:姓名、学号、成绩(英语、体育、美术、数学)、年龄

• b.给这个班级添加学生
• c.根据姓名查看班级里的某个学生的信息
• d.根据姓名删除一个指定的学生信息
• e.查看班级的所有的学生信息
• f.求指定的学生平均成绩

提示：用一个列表来存整个班级的学生信息；列表的每个元素是字典，来存储每个学生的信息

def head():
    print('欢迎进入千峰学生管理系统')
    print('1.添加学生')
    print('2.查看所有学生信息')
    print('3.按姓名查询学生信息')
    print('4.求指定的学生平均成绩')
    print('5.删除学生')
    print('q.退出系统')
    print('>>>', end = '')
    return 0

def add_student_information(stu_information):
    new_infomation = {}
    new_name = input('请输入学生姓名:')
    new_infomation['student_name'] = new_name

    new_age = int(input('请输入学生年龄:'))
    new_infomation['student_age'] = new_age

    new_num = input('请输入学生学号:')
    while True:
        flag4 = 0
        for item in stu_information:
            if item['student_num'] == new_num:
                print('学号已经存在')
                new_num = input('请重新输入学生学号:')
            else:
                new_infomation['student_num'] = new_num
                flag4 = 1
                break
        if flag4:
            break
        else:
            continue
    new_math = int(input('请输入学生数学成绩:'))
    new_infomation['math'] = new_math

    new_english = int(input('请输入学生英语成绩:'))
    new_infomation['english'] = new_english

    new_art = int(input('请输入学生美术成绩:'))
    new_infomation['art'] = new_art

    new_IE = int(input('请输入学生体育成绩:'))
    new_infomation['IE'] = new_IE
    return new_infomation

def find_student_information(stu_name,stu_class):
    for index in range(len(stu_class)):
        if stu_class[index]['student_name'] == stu_name:
            return index
            break
    else:
        return None

def averge_score(num, stu_class):
    sum1 = 0
    for student in stu_class:
        if student['student_num'] == num:
            sum1 = student['math'] + student['art'] + student['IE'] + student['english']
            break
    average = sum1 / 4
    return average

def drop_student_information(stu_num, stu_class):
    for index in range(len(stu_class)):
        if stu_class[index]['student_num'] == num:
            return index
            break
    else:
        return None

student_class = [{'student_name': '张三', 'student_age': 18, 'student_num': '001', 'math': 85, 'english': 65, 'art': 94, 'IE': 85},
                 {'student_name': '王五', 'student_age': 20, 'student_num': '002', 'math': 87, 'english': 78, 'art': 60, 'IE': 80},
                 {'student_name': '李四', 'student_age': 9, 'student_num': '003', 'math': 85, 'english': 79, 'art': 90, 'IE': 94}
                 ]
flag = 1

while flag != 'q':
    head()
    flag = input()
    if flag == '1':
        student_class.append(add_student_information(student_class))
        print('添加成功！')
    elif flag == '2':
        for item in student_class:
            print(item)
    elif flag == '3':
        name = input('请输入需要查询的学生姓名：')
        i = find_student_information(name, student_class)
        if str(i).isnumeric():
            print(student_class[i])
        else:
            print('该学生不在该班级')
    elif flag == '4':
        num = input('请输入学生学号:')
        print('该生平均分：%.2f' % (averge_score(num, student_class)))
    elif flag == '5':
        num = input('请输入需要删除的学生学号：')
        i = drop_student_information(num, student_class)
        if str(i).isnumeric():
            del student_class[i]
            print('删除成功！')
        else:
            print('该生不在该班级')
    elif flag == 'q':
        break