学生管理系统 Python语言

def show_student():    print(('*'*20).center(55))    print('1.添加学生信息'.center(50))    print('2.修改学生信息'.center(50))    print('3.删除学生信息'.center(50))    print('4.查询学生信息'.center(50))    print('5.退出信息系统'.center(50))    print('6.显示学生信息'.center(50))    print(('*'*20).center(55))

def add_student():    a_name = input('please input the student name : ')    a_sex = input('please input the the sex :')    a_height = input('please input the height：')    add_diclt = {'name':a_name ,'sex':a_sex ,'height':a_height}    sum_list.append(add_diclt)    return sum_listdef alter_student():    al1 = 0    alte = input('please input the alter the student message name :')    for al in range(len(sum_list)):        if sum_list[al]['name'] == alte :            print(sum_list[al])            al1 = al        else:            if al == len(sum_list)-1:                print('do not find the student name ')                exit()            continue

    a_name = input('please input the student name : ')    a_sex = input('please input the the sex :')    a_height = input('please input the height：')    add_diclt = {'name':a_name ,'sex':a_sex ,'height':a_height}    sum_list.insert(al1,add_diclt)    sum_list.pop(al1+1)    return sum_listdef del_student():    dll = 0    de_name = input('please input the del the student message name :')    for dl in range(len(sum_list)):        if sum_list[dl]['name'] == de_name:            print(sum_list[dl])            dll = dl        else:            if dl == len(sum_list)-1:                print('do not exit')                exit()            continue    sum_list.pop(dll)    print('删除成功！')    return sum_listdef find_student():    find_name = input('please input the find the student message name :')    for f1 in range(len(sum_list)):        if sum_list[f1]['name'] == find_name:            print(sum_list[f1])        else:            if f1 == len(sum_list)-1:                print('not find your input the name .please input continue')                find_student()            continue    return sum_list

def main_student():    while 1:     show_student()     s1 = input('please input the number:')     if s1 == '1':         print(add_student())     if s1 == '2':         print(alter_student())     if s1 == '3':         del_student()     if s1 == '4':         find_student()     if s1 == '5':         print('是否退出，如果退出输入Y，如果继续，输入N ')         e1 = input('<<<')         if e1.upper() == 'Y':             exit()         else:             show_student()     if s1 == '6':         print(sum_list)

sum_list = []       #总列表lis1 = ['deng','123','taibai','123456','alex','2019','Jing','2017']lis2 = []i = 3while i > 0:    username = input('please input the username :')    password = input('please input the password : ')    if username in lis1[0::2] and password in lis1[1::2] :        print('验证成功...')        lis2.append(username)        lis2.append(password)        break    else:        i -= 1        print('验证失败，请再次尝试，您还有'+str(i)+'次机会')        continueif i == 0:    exit()print('欢迎{name}进入学生管理系统'.format(name = lis2[0]))main_student()