2019-01-03 学生信息管理系统

all_students = [{'name': 'stu1', 'age': 19, 'score': 81, 'tel': '192222','Student_ID': '123456'}]
str_choice = '1、添加学生 ' \
             '2、 查看学生' \
             '3、 修改学生信息' \
             '4、 删除学生' \
             '5、 返回'
choice = 0
# 将choice初始化为0
while choice != 5:
    # 当choice是5的时候，跳出循环
    print(str_choice)
    choice = int(input("输入数字选择以上选项："))
    if choice == 1:
        all_students.append({'name': 1})
        print('请输入需要添加的信息')
        n = input('名字：')
        all_students[-1]['name'] = n
        n = input('年龄：')
        all_students[-1]['age'] = n
        n = input('成绩：')
        all_students[-1]['score'] = n
        n = input('电话：')
        all_students[-1]['tel'] = n
        n = input('学号：')
        all_students[-1]['Student_ID'] = n
        n = input('1、继续'
                  '2、返回')
        # 此处判断是否继续，continue决定出去
        if n == '1':
            choice = 1
        elif n == '2':
            continue
    elif choice == 2:
        while choice != 4:
            print('1、查找所有'
                  '2、按名字查询'
                  '3、按学号查询'
                  '4、返回')
            choice = int(input("输入数字选择以上选项："))
            i = 0
            # 后面用来获取循环次数，了解查找次数
            if choice == 1:
                for x in all_students:
                    print(x)
            elif choice == 2:
                n = input('请输入要查询的名字：')
                for x in all_students:
                    if n == x['name']:
                        print(x)
                        continue
                    i += 1
                    if i == len(all_students):
                        print('查无此人')
            elif choice == 3:
                n = input('请输入要查询的学号：')
                for x in all_students:
                    if n == x['Student_ID']:
                        print(x)
                        continue
                    i += 1
                    if i == len(all_students):
                        print('查无此人')
            elif choice == 4:
                continue
    elif choice == 3:
        n = 0
        while n != '2':
            n = input('请输入要修改的名字：')
            # 此处顾名思义
            for x in all_students:
                if n == x['name']:
                    print('请输入需要变更的的信息')
                    n = input('名字：')
                    all_students[x]['name'] = n
                    n = input('年龄：')
                    all_students[x]['age'] = n
                    n = input('成绩：')
                    all_students[x]['score'] = n
                    n = input('电话：')
                    all_students[x]['tel'] = n
                else:
                    print('查无此人')
            n = input('1、继续'
                      '2、返回')
            if n == '1':
                choice = 3
                continue
            elif n == '2':
                continue
    elif choice == 4:
        n = 0
        while n != '2':
            n = input('请输入要删除的名字：')
            for x in all_students[:]:
                if x['name'] == n:
                    all_students.remove(x)
                else:
                    print('查无此人')
            n = input('1、继续'
                      '2、返回')