登錄界面

import file_manager

# 全局變量

file_name = 'user_info.json'  # 保存所有用戶的信息的文件

key_user_name = 'user_name'
key_password = 'password'

# =======================注冊==================
"""
為了下次打開系統(tǒng)的時候能夠正常登錄，注冊成功的信息需要保存。保存用戶名和密碼
一個系統(tǒng)可以注冊多個用戶，可以用列表保存多個用戶。通過字典來保存每個用戶的用戶名和密碼
[
    {'user_name':'用戶名','password':'密碼'},
]
保存到userinfo.json中
"""
def is_register(user_name):
    """
    判斷指定用戶名是否已經注冊過
    :param user_name:
    :return:
    """
    all_user = file_manager.read_json_file(file_name)
    if not all_user:
        return False
    for user in all_user:
        if user[key_user_name] == user_name:
            return True
    return False


def get_all_user():
    """
    獲取所有的用戶
    :return:
    """
    all_user = file_manager.read_json_file(file_name)
    if all_user:
        return all_user
    return []


def register():
    """
    注冊
    :return:
    """
    # 1.輸入用戶名
    while True:
        user_name = input('請輸入一個用戶名(3-10位):')
        # 判斷是否符合格式要求
        if not 3 <= len(user_name) <= 10:
            print('輸入有誤，請重新輸入!')
            continue
        # 判斷是否已經注冊過
        if is_register(user_name):
            print('%s,已經注冊過,請重新輸入!' % user_name)
            continue
        print('用戶名可用！')
        break

    # 2.輸入密碼
    while True:
        password = input('請輸入密碼(6-16位):')
        if not 6 <= len(password) <= 16:
            print('密碼輸入有誤，請重新輸入!')
            continue

        re_password = input('確認密碼:')
        if password != re_password:
            print('和第一次輸入的密碼不一樣，請重新輸入!')
            continue
        break

    # 3.保存用戶名和密碼
    all_user = get_all_user()
    all_user.append({key_user_name: user_name, key_password:password})
    re = file_manager.write_json_file(file_name, all_user)
    if re:
        print('注冊成功!')
    else:
        print('注冊失敗!')


# ======================登錄===================
def login():
    """
    登錄
    :return:
    """
    user_name = input('請輸入用戶名:')
    password = input('請輸入密碼:')

    # 1.看輸入的用戶名是否已經注冊過
    all_user = get_all_user()
    for user in all_user:
        if user[key_user_name] == user_name:
            if user[key_password] == password:
                print('登錄成功！')
                return user_name
            else:
                print('密碼錯誤，登錄失敗!')
                return None
    print('沒有注冊,登錄失敗!')
    return None



# ======================主頁===================
import student_system

def show_main_page():
    while True:
        print(file_manager.read_text_file('login.txt'))
        value = input('請選擇(1-3):')

        # 1.退出
        if value == '3':
            break

        # 2.注冊
        elif value == '2':
            register()

        elif value == '1':
            # print('登錄')
            user_name = login()
            if user_name:
                # 如果登錄成功就進入管理系統(tǒng)
                student_system.user_name = user_name
                student_system.main_page()

        else:
            print('輸入有誤, 重新選擇!')




if __name__ == '__main__':
    # 1.顯示登錄界面(主界面)
    show_main_page()

學生系統(tǒng)界面

import file_manager
user_name = ''

'''
一個賬號對應管理不同的學生 --- 不同的用戶對應不同的json文件
json文件中的格式：
{
    'name':''，
    'number':個數(shù)，
    'all_student':[
        {'name':,'age':,'tel':,'id':}  
    ]
'''
key_number = 'number'
key_all_students = 'all_students'
key_name = 'name'
key_age = 'age'
key_tel = 'tel'
key_id = 'id'

def get_system_info():
    """獲取系統(tǒng)文件內容"""
    system_info = file_manager.read_json_file(user_name+'.json')
    if system_info:
        return system_info
    return {}

def creat_id():
    """產生學號"""
    system_info = get_system_info()
    number = system_info.get(key_number, 0)
    number += 1
    id = 'stu' + str(number).rjust(4, '0')
    return id, number

def main_interface():
    return print("""
    *****歡迎進入千峰學生管理系統(tǒng)****
    *         1.添加學生          *
    *         2.刪除學生          *
    *         3.修改信息          *
    *         4.查找信息          *
    *         5.退出系統(tǒng)          *
    ******************************
    """)

# 1.添加學生
def add_student():
    Students_table = []
    while True:
        with open('./student.txt', 'r', encoding='utf-8') as f:
            content = f.read()
            # print(eval(content))
        # f = open('./student.txt', 'r', encoding='utf-8')
        # f.read(str(student) + '\n')
        # f.close()
        name = input('請輸入學生姓名：')
        age  = input('請輸入學生年齡：')
        tel = input('請輸入學生電話：')
        # 產生學號
        id, number = creat_id()
        student = {key_name: name, key_age: age, key_tel: tel, key_id: id}
        Students_table.append(student)
        with open('./student.txt', 'w', encoding='utf-8') as f:
            content = f.write(str(Students_table))
        # f = open('./student.txt', 'a', encoding='utf-8')
        # f.write(str(student) + '\n')
        # f.close()
        print('添加成功')
        print('==============================')
        print('1.繼續(xù)添加')
        print('2.返回上一級')
        print('==============================')
        number2 =int (input('請選擇：'))
        if number2 == 1:
            continue
        else:
            break

# 2.刪除學生
def del_student():
    while True:
        with open('./student.txt', 'r', encoding='utf-8') as f:
            Students_table = eval(f.read())
        print(Students_table)
        name2 = input('請輸入需要刪除學生的姓名：')
        for student in Students_table:
            if student['name'] == name2:
                Students_table.remove(student)
                print(Students_table)
                print('==============================')
                with open('./student.txt', 'w', encoding='utf-8') as f:
                    content = f.write(str(Students_table))
                print('刪除成功')
                print('==============================')
                print('1.繼續(xù)刪除')
                print('2.退出')
                print('==============================')
                number2 = int(input('請選擇：'))
                if number2 == 1:
                    print('==============================')
                    continue
                else:
                    break

# 3.修改信息
def recompose_student():
    while True:
        with open('./student.txt', 'r', encoding='utf-8') as f:
            Students_table = eval(f.read())   # 從文件中取出的數(shù)據(jù)賦值個一個列表
            print(Students_table)
            name_gai = input('請輸入要修改的姓名：')
            for student in Students_table:
                if student['name'] == name_gai:
                    print('=============================')
                    print(student)
                    print('==============================')
                    print('1.修改姓名')
                    print('2.修改年齡')
                    print('3.修改電話')
                    print('4.修改學號')
                    print('==============================')
                    number3 = int(input('請選擇:'))
                    print('==============================')
                    if number3 == 1:
                        name3 = input('請輸入修改后的姓名：')
                        print('============================')
                        student['name'] = name3
                    elif number3 == 2:
                        age3 = input('請輸入修改后的年齡：')
                        print('============================')
                        student['age'] = age3
                    elif number3 == 3:
                        tel3 = input('請輸入修改后的電話：')
                        print('============================')
                        student['tel'] = tel3
                    else:
                        num3 = input('請輸入修改后的學號：')
                        print('============================')
                        student['id'] = num3
                    print(Students_table)
                    with open('./student.txt', 'w', encoding='utf-8') as f:
                        content = f.write(str(Students_table))
                    print('==============================')
                    print('修改成功')
                    print('==============================')
            print('1.繼續(xù)修改')
            print('2.退出')
            print('==============================')
            number3 = int(input('請選擇：'))
            if number3 == 1:
                continue
            else:
                break

# 4.查找信息
def find_student():
    while True:
        with open('./student.txt', 'r', encoding='utf-8') as f:
            Students_table = eval(f.read())  # 從文件中取出的數(shù)據(jù)賦值個一個列表
        print('1.按姓名查找')
        print('2.按學號查找')
        print('3.查看全部學生')
        print('==============================')
        number4 = int(input('請選擇：'))
        print('==============================')
        if number4 == 1:
            name4 = input('請輸入查找的學生姓名：')
            print('==============================')
            for student in Students_table:
                if student['name'] == name4:
                    print(student)
                    print('==============================')
            print('1.繼續(xù)查找')
            print('2.退出')
            print('==============================')
            number4 = int(input('請選擇：'))
            if number4 == 1:
                continue
            else:
                break
        elif number4 == 2:
            id4 = input('請輸入學生的學號：')
            print('==============================')
            for student in Students_table:
                if student['id'] == id4:
                    print(student)
                    print('==============================')
            print('1.繼續(xù)查找')
            print('2.退出')
            print('==============================')
            number4 = int(input('請選擇：'))
            if number4 == 1:
                continue
            else:
                break
        elif number4 == 3:
            for student in Students_table:
                    print(student)
                    print('==============================')
            print('1.繼續(xù)查找')
            print('2.退出')
            print('==============================')
            number4 = int(input('請選擇：'))
            if number4 == 1:
                continue
            else:
                break
#==============主頁===================

def main_page():
    while True:
        print(file_manager.read_text_file('system.txt'))
        value = input('請選擇(1-5):')

        # 1.返回
        if value == '5':
            break
        elif value == '1':
            add_student()
            print('添加學生')
        elif value == '2':
            del_student()
            print('刪除學生')
        elif value == '3':
            recompose_student()
            print('修改學生')
        elif value == '4':
            find_student()
            print('查找學生')
        else:
            print('輸入有誤，重新輸入!')

if __name__ == '__main__':
    # main_page()
    print({}.get('abc', 0))