构思

学生管理系统 应该包含老师注册登录 管理学生信息（增删改查）还有数据持久化

因为数据存入JSON文件 增删改查都需要读取和修改文件
所以需要一个读写文件的方法文件 file_manager
密码加密可以用到哈希模块文件 tools
老师和学生的类文件 model
程序入口（主页）文件index
核心增删改查文件 student_manager

file_manager.py

"""Project: ClassStudentCreator: 猫猫Create time: 2021-02-25 20:23IDE: PyCharmIntroduction:https://blog.csdn.net/Cantevenl/article/details/115439530"""base_dir = 'files/' # 定义一个变量 文件路径# 读文件的函数def read_file(file_name): try: with open(base_dir + file_name, 'r', encoding='utf8') as file: content = file.read() return content except FileNotFoundError: print('文件未找到')def write_json(file_name, data): with open(base_dir + file_name, 'w', encoding='utf8') as file: import json json.dump(data, file)def read_json(file_name, default_data): try: with open(base_dir + file_name, 'r', encoding='utf8') as file: import json return json.load(file) except FileNotFoundError: # print('文件未找到') return default_data

tools.py

"""Project: ClassStudentCreator: 猫猫Create time: 2021-02-25 20:24IDE: PyCharmIntroduction:https://blog.csdn.net/Cantevenl/article/details/115439530"""# 加密密码import hashlibdef encrypt_password(passwd, x='zhumaogouniu'): h = hashlib.sha256() h.update(passwd.encode('utf8')) h.update(x.encode('utf8')) return h.hexdigest()

model.py

"""Project: ClassStudentCreator: 猫猫Create time: 2021-02-25 20:24IDE: PyCharmIntroduction:https://blog.csdn.net/Cantevenl/article/details/115439530"""# 创建一个老师对象class Teacher(object): def __init__(self, name, password): import tools self.name = name self.password = tools.encrypt_password(password)class Student(object): def __init__(self, s_id, name, age, gender, tel): self.s_id = s_id self.name = name self.age = age self.gender = gender self.tel = tel

index.py

"""Project: ClassStudentCreator: 猫猫Create time: 2021-02-25 20:25IDE: PyCharmIntroduction:https://blog.csdn.net/Cantevenl/article/details/115439530"""import sysimport file_manager # 导入自己写的读取文件模块import modelimport student_managerdef register(): # 读取文件,查看文件里是否有数据。如果文件不存在，默认是一个字典 data = file_manager.read_json('data.json', {}) while True: teacher_name = input('请输入账号(3~6位):') if not 2 <= len(teacher_name) <= 6: print('账号不符合要求,请重新输入!') else: break if teacher_name in data: print('注册失败!该账号已经被注册!') return while True: password = input('请输入密码(6~12位):') if not 6 <= len(password) <= 12: print('密码不符合要求,请重新输入!') else: break # 用户名密码都已经输入正确以后 将用户名和密码以key:value形式储存 # 可以创建一个teacher对象 t = model.Teacher(teacher_name, password) data[t.name] = t.password file_manager.write_json('data.json', data)def login(): # 读取文件,查看文件里是否有数据。如果文件不存在，默认是一个字典 data = file_manager.read_json('data.json', {}) teacher_name = input('请输入老师账号:') if teacher_name not in data: print('登录失败!该账号没有注册!') return password = input('请输入密码:') import tools if data[teacher_name] == tools.encrypt_password(password): student_manager.name = teacher_name print('登录成功') student_manager.show_manager() else: print('密码错误,登陆失败!')def start(): content = file_manager.read_file('welcome.txt') while True: operate = input(content + '\n请选择(1-3)：') if operate == '1': print('登录') login() elif operate == '2': print('注册') register() elif operate == '3': print('退出') # break # 把循环退出 # exit(0) # 退出整个程序 sys.exit(0) # 退出程序 else: print('输入有误！')if __name__ == '__main__': start()

student_manager.py

"""Project: ClassStudentCreator: 猫猫Create time: 2021-02-25 20:26IDE: PyCharmIntroduction:https://blog.csdn.net/Cantevenl/article/details/115439530"""import file_managerimport modelname = ''# 添加def add_student(): x = file_manager.read_json(name + '.json', {}) if not x: students = [] num = 0 else: students = x['all_student'] # s_id通过json字典里的num来生成 num = int(x['num']) while True: s_name = input('请输入学生姓名:') s_age = input('请输入年龄:') s_gender = input('请输入性别:') s_tel = input('请输入电话号码:') num += 1 # 字符串的zfill方法，在字符串的前面补0 s_id = 'student_id_' + str(num).zfill(3) # 创建一个Student对象 s = model.Student(s_id, s_name, s_age, s_gender, s_tel) students.append(s.__dict__) # 拼接字典 data = {'all_student': students, 'num': len(students)} # 把数据写入到文件里 以老师名字.json 把data写进去 file_manager.write_json(name + '.json', data) choice = input('添加成功!\n1.继续\n2.返回\n请选择(1-2):') if choice == '2': break# 显示 查找def show_student(): choice = input('1.查看所有学生\n2.根据姓名查找\n3.根据学号查找\n其他:返回\n请选择:') students = file_manager.read_json(name + '.json', {}) all_students = students.get('all_student', []) # get拿列表里的数据，拿不到默认是一个空列表[] if not all_students: print('该老师没有学生，请添加学生') return if choice == '1': # 查看所有学生 pass elif choice == '2': # 根据姓名查看 s_name = input('请输入学生的姓名:') all_students = filter(lambda s: s['name'] == s_name, all_students) # students就只保留了指定名字的学生 elif choice == '3': # 学号查找 s_id = input('请输入学生的学号:') all_students = filter(lambda s: s['s_id'] == s_id, all_students) else: return if not students: print('未找到学生') return for student in all_students: print('学号:{s_id},姓名:{name},性别:{gender},年龄{age},电话号码{tel}'.format(**student))# 修改def modify_student(): key = value = '' m = file_manager.read_json(name + '.json', {}) all_students = m.get('all_student', []) if not all_students: print('该老师没有学生,请添加学生') return modify = input('1.根据姓名修改\n2.根据学号修改\n其他:返回\n请选择:') if modify == '1': value = input('请输入要修改的学生名字:') key = 'name' elif modify == '2': value = input('请输入要修改的学生学号:') key = 's_id' else: return students = list(filter(lambda s: s[key] == value, all_students)) if not all_students: print('没有找到对应的学生') return for i, student in enumerate(students): print('{xiabiao} 学号:{s_id},姓名:{name},性别:{gender},年龄{age},电话号码{tel}'.format(xiabiao=i, **student)) n = int(input('请输入需要修改的学生的标号(0~{}),q-->返回:'.format(len(students) - 1))) if not 0 <= n <= len(students): print('输入的内容错误') return all_students.remove(students[n]) students[n]['s_id'] = new_input((students[n]['s_id']), "请输入修改后的学生学号[回车则不修改]:") students[n]['name'] = new_input((students[n]['name']), "请输入修改后的学生姓名[回车则不修改]:") students[n]['gender'] = new_input((students[n]['gender']), "请输入修改后的学生性别[回车则不修改]:") students[n]['age'] = new_input((students[n]['age']), "请输入修改后的学生年龄[回车则不修改]:") students[n]['tel'] = new_input((students[n]['tel']), "请输入修改后的学生电话号码[回车则不修改]:") all_students.append(students[n]) print(all_students) m['all_student'] = all_students file_manager.write_json(name + '.json', m)# 删除def delete_student(): y = file_manager.read_json(name + '.json', {}) all_students = y.get('all_student', []) key = value = '' if not all_students: print('该老师没有学生，请添加学生') return num = input('1.按照姓名删除\n2.按照学号删除\n其他:返回\n请选择:') if num == '1': key = 'name' value = input('请输入要删除的学生名字:') elif num == '2': key = 's_id' value = input('请输入要删除的学生学号:') else: return students = list(filter(lambda s: s.get(key, '') == value, all_students)) if not students: print('没有找到对应的学生') return for i, student in enumerate(students): print('{xiabiao} 学号:{s_id},姓名:{name},性别:{gender},年龄{age},电话号码{tel}'.format(xiabiao=i, **student)) n = input('请输入需要删除的学生的标号(0~{}),q-->返回:'.format(len(students) - 1)) if not n.isdigit() or not 0 <= int(n) <= len(students): print('输入的内容错误') return # 将学生从all_students里删除 # all_students.pop(n) all_students.remove(students[int(n)]) # 更新新的名单 y['all_student'] = all_students file_manager.write_json(name + '.json', y)# 显示管理页面def show_manager(): content = file_manager.read_file('students_page.txt') % name while True: print(content) operate = input('请选择(1-5):') if operate == '1': add_student() elif operate == '2': show_student() elif operate == '3': modify_student() elif operate == '4': delete_student() elif operate == '5': break else: print('输入错误!')# 修改时用的input方法def new_input(old, new): input_str = input(new) if len(input_str) > 0: return input_str else: return old

美化文本

通过自己写的读取文件方法可以直接读取文本（类似界面）

welcome.txt

================================ ** 欢迎来到学生管理系统** 1. 登 录 2. 注 册 3. 退 出 ** **================================

students_page.txt

================================❀❀ 欢迎%s老师进入学生管理系统: 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❀❀ ❀❀================================

执行效果

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