python基础入门之十八 —— 面向对象版学员管理系统

 

 main.py:

from StudentMannager.manager import *if __name__ == '__main__':    student_manager = Manager()    student_manager.run()

manager.py:

from StudentMannager.student import *class Manager(object):    def __init__(self):        self.stu_list = []    # 一. 程序入口函数    def run(self):        # 1. 加载文件里面的学员数据        self.load_student()        while True:            # 2. 显示功能菜单            self.show_menu()            # 3. 用户输入目标功能序号            menu_num = int(input('请输入您需要的功能序号：'))            # 4. 根据用户输入的序号执行不同的功能 -- 如果用户输入1，执行添加            if menu_num == 1:                # 添加学员                self.add_student()            elif menu_num == 2:                # 删除学员                self.del_student()            elif menu_num == 3:                # 修改学员信息                self.modify_student()            elif menu_num == 4:                # 查询学员信息                self.search_student()            elif menu_num == 5:                # 显示所有学员信息                self.show_student()            elif menu_num == 6:                # 保存学员信息                self.save_student()            elif menu_num == 7:                # 退出系统 -- 退出循环                break    # 二. 系统功能函数    # 2.1 显示功能菜单 -- 打印序号的功能对应关系 -- 静态    @staticmethod    def show_menu():        print('请选择如下功能：')        print('1:添加学员')        print('2:删除学员')        print('3:修改学员信息')        print('4:查询学员信息')        print('5:显示所有学员信息')        print('6:保存学员信息')        print('7:退出系统')    # 2.2 添加学员    def add_student(self):        name = input("name = ")        gender = input("gender = ")        tel = input("tel = ")        stu = student(name,gender,tel)        self.stu_list.append(stu)        print('添加成功')    # 2.3 删除学员    def del_student(self):        del_name = input("del_name = ")        for i in self.stu_list:            if del_name == i.name:                self.stu_list.remove(i)                break        else:            print('查无此人！')        print('删除成功')    # 修改学员信息    def modify_student(self):        modify_name = input("modify_name = ")        for i in self.stu_list:            if modify_name == i.name:                i.gender = input(f'{i.name}\'s gender = ')                i.tel = input(f'{i.name}\'s tel = ')                print('修改成功')                break        else:            print('查无此人！')    # 查询学员信息    def search_student(self):        search_name = input("search_name = ")        for i in self.stu_list:            if search_name == i.name:                print(i)                break        else:            print('查无此人！')    # 显示所有学员信息    def show_student(self):        print('姓名\t年龄\t电话\t')        for i in self.stu_list:            print(f'{i.name}\t{i.gender}\t{i.tel}')        print('-'*20)    # 保存学员信息    def save_student(self):        try:            f = open('student.data','w')            new_list = [i.__dict__ for i in self.stu_list]  # __dict__ 返回类内部所有的属性和方法对应的字典print(new_list)            f.write(str(new_list))            f.close()        except Exception as result:            print(result)    # 加载学员信息    def load_student(self):        try:            f = open('student.data','r')        except:            f = open('student.data', 'w')        else:            data = f.read()            new_list = eval(data)  # eval() 函数用来执行一个字符串表达式，并返回表达式的值。            self.stu_list = [student(i['name'],i['gender'],i['tel']) for i in new_list]        finally:            f.close()

student.py:

class student(object):    def __init__(self,name,gender,tel):        self.name = name        self.gender = gender        self.tel = tel    def __str__(self):        return f'name = {self.name},gender = {self.gender},tel = {self.tel}'