day8作业

1.声明一个字典保存一个学生的信息,学生信息中包括: 姓名、年龄、成绩(单科)、电话

message = {'name':'小明','age':'15','score':'90','tel':'1235'}

2.声明一个列表,在列表中保存6个学生的信息(6个题1中的字典)

a.统计不及格学生的个数

message = [{'name':'小明','age':'15','score':'90','tel':'1235'},
           {'name':'小王','age':'18','score':'91','tel':'1237'},
           {'name':'小张','age':'19','score':'55','tel':'1234'},
           {'name':'小李','age':'22','score':'45','tel':'1236'},
           {'name':'小赵','age':'20','score':'77','tel':'1230'},
           {'name':'小杨','age':'21','score':'67','tel':'1238'},
           {'name':'小马','age':'16','score':'78','tel':'1239'}]

num1 = 0
for index in range(len(message)):
    dict1 = message[index]
    value1 = dict1['score']
    if value1 <= '60':
            num1 += 1
print('不及格学生个数:',num1)

b.打印不及格学生的名字和对应的成绩

for index in range(len(message)):
    dict1 = message[index]
    if dict1['score'] <= '60':
        print('不及格学生名字和成绩:',dict1['name'],dict1['score'])

c.统计未成年学生的个数

num1 = 0
for index in range(len(message)):
    dict1 = message[index]
    if int(dict1['age']) < 18:
        num1 += 1
print('未成年学生个数:',num1)

d.打印手机尾号是8的学生的名字

for index in range(len(message)):
    dict1 = message[index]
    num1 = dict1['tel']
    if int(num1)%10 == 8:
        print('手机尾号是8的学生的名字;',dict1['tel'])

e.打印最高分和对应的学生的名字

score1 = 0
for index in range(len(message)):
    dict1 = message[index]
    score2 = int(dict1['score'])
    if score2 > score1:
        score1 = score2
        name1 = dict1['name']
print(name1,score1)

f.将列表按学生成绩从大到小排序(挣扎一下,不行就放弃)

3.尝试实现学生管理系统的界面(见视频)

list1 = []
while True:
    print('=======================================================')
    print('**欢迎caoqi.')
    print()
    print('1. 添加学生')
    print('2. 查看学生')
    print('3. 修改学生信息')
    print('4. 删除学生')
    print('5. 返回')
    print()
    print('=======================================================')
    num1 = int(input('请选择(1-5):'))
    while num1 == 1:
        dict1 ={}
        name1 = input('请输入学生姓名:')
        dict1['name'] = name1
        age1 = input('请输入学生的年龄:')
        dict1['age'] = age1
        tel1 = input('请输入学生的电话:')
        dict1['tel'] = tel1
        list1.append(dict1)
        print('添加成功')
        print('1. 继续')
        print('2. 返回')
        num1 = int(input('请选择(1-2):'))
        if num1 == 2:
            num1 = 0
            break
    while num1 == 2:
        print('1. 查看所有学生')
        print('2. 按姓名查找')
        print('3. 按学号查找')
        print('4. 返回')
        num2 = 0
        while num2 <= 3:
            num2 = int(input('请选择(1-4):'))
            if num2 == 1:
                print(list1)
                print('1. 返回')
                num2 = 0
        else:
            if num2 == 4:
                break

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