學(xué)生管理系統(tǒng)

import json


def home_page():    # 首頁界面
    print('='*40)
    print('**歡迎來到學(xué)生管理系統(tǒng)**'.center(30, ' '))
    print('◆□1.登     錄'.center(36, ' '))
    print('◆□2.注     冊'.center(36, ' '))
    print('◆□3.退     出'.center(36, ' '))
    print('=' * 40)
    n = int(input('請選擇（1-3）：'))
    if n == 1:
        log_in()
    elif n == 2:
        sign_in()
    elif n == 3:
        pass
    else:
        print('輸入數(shù)據(jù)無效')
        home_page()


def log_in():  # 登錄界面
    print('=' * 40)
    print('**登錄**'.center(38, ' '))
    global user_name
    user_name = input('請輸入用戶名：')
    pw = input('請輸入密碼（3-6位）：')
    with open('data.json', 'r', encoding='utf-8') as f:
        content = json.loads(f.read())
    for dict1 in content:
        if dict1['username'] == user_name:
            if dict1['password'] == pw:
                print('登錄成功！')
                return menu()
            else:
                print('登錄失??！密碼輸入錯誤')
                return home_page()
    else:
        print('登錄失??！用戶沒注冊！')
        return home_page()


def sign_in():  # 注冊界面
    print('=' * 40)
    print('**注冊**'.center(38, ' '))
    user_name1 = input('請輸入用戶名：')
    while True:
        pw = input('請輸入密碼（3-6位）：')
        pw1 = input('請確認(rèn)密碼：')
        if len(pw) < 3 or len(pw) > 6:
            print('輸入密碼不規(guī)范')
            continue
        elif pw != pw1:
            print('兩次輸入的密碼不一致')
            continue
        else:
            break
    with open('data.json', 'r', encoding='utf-8') as f:
        content = json.loads(f.read())
    for dict1 in content:
        if dict1['username'] == user_name1:
            print('該用戶名已注冊')
            return home_page()
    with open('data.json', 'w', encoding='utf-8') as f:
        content.append({'username': user_name1, 'password': pw, 'students': []})
        f.write(json.dumps(content))
    print('注冊成功！')
    return home_page()


def menu():  # 菜單界面
    print('=' * 40)
    print('??歡迎%s' % user_name)

    print('? 1. 添加學(xué)生')
    print('? 2. 查看學(xué)生')
    print('? 3. 修改學(xué)生信息')
    print('? 4. 刪除學(xué)生')
    print('? 5. 返回')
    n = int(input('請選擇：'))
    if n == 1:
        return add_student()


def add_student():  # 添加學(xué)生
    global student
    print('=' * 40)
    print('**添加學(xué)生信息**'.center(36, ' '))
    with open('data.json', 'r', encoding='utf-8') as f:
        content = json.loads(f.read())
    # print(content)
    for dict1 in content:
        if dict1['username'] == user_name:
            student = dict1
            break
    name = input('輸入學(xué)生姓名：')
    # print(student)
    for index in student['students']:
        if name == index['name']:
            print('該學(xué)生已存在！')
            return menu()
    age = int(input('輸入學(xué)生年齡：'))
    gender = input('輸入學(xué)生性別：')
    tel = input('輸入電話號碼：')
    student['students'].append({'name': name, 'age': age, 'gender': gender, 'tel': tel})
    with open('data.json', 'w', encoding='utf-8') as f:
        f.write(json.dumps(content))
    print('添加成功！')
    print('='*40)
    print('1.繼續(xù)添加')
    print('2.返回')
    n = int(input('請選擇：'))
    if n == 1:
        return add_student()
    elif n == 2:
        return menu()


if __name__ == '__main__':
    home_page()