python基础入门之十八 —— 面向对象版学员管理系统

Posted 2021-03-02 孤岛蓝鲸

 

 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}\'