python基础——函数实践（学生管理系统）

学习目标：

• python函数实践——学生管理系统搭建

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学习内容：

1. 字典dict()的增伤改查
2. 函数的使用

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学习时间：

• 周一晚上 7 点—晚上9点

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学习产出：

• 简单的学生管理系统增伤改查函数实现

# coding:utf-8
# script_name:
# author:
# create_time:
# **************************************************
class StudentManagerSystem(object):
    def __init__(self):
        self.__student_dict = {}

    def main_print(self):
        print("----------------请选择功能----------------"
              "\n1.添加学员"
              "\n2.删除学员"
              "\n3.修改学员"
              "\n4.查询学员"
              "\n5.显示所有学员"
              "\n6.退出系统")

    def screen_info(self):
        while True:
            self.main_print()
            choose = input("请输入您的操作序号：")
            if choose == '1':
                print("----------------添加学员----------------")
                self.add_student()
            elif choose == '2':
                print("----------------删除学员----------------")
                self.delete_student()
            elif choose == '3':
                print("----------------修改学员----------------")
                self.modify_student()
            elif choose == '4':
                print("----------------查询学员----------------")
                self.select_student_one()
            elif choose == '5':
                print("----------------显示所有学员----------------")
                self.select_student_all()
            elif choose == '6':
                print("退出系统")
                break
            else:
                print("输入参数错误，请重新输入")
            print("=" * 50)
            print(self.__student_dict)

    def add_student(self):
        while True:
            try:
                name, age, phone = map(str, input("请输入要添加的学生信息(英文逗号隔开)：").split(','))
                flags = True
            except:
                print("输入错误，请输入：姓名,年龄,电话")
                flags = False
            if flags:
                break

        if name not in self.__student_dict.keys():
            self.__student_dict[name] = (name, age, phone)
            print("学生{}添加成功！".format(name))
        else:
            print("学生{}添加失败！，{}已录入".format(name, name))

    def delete_student(self):
        name = input("请输入要删除的学生姓名：")
        if name in self.__student_dict.keys():
            del self.__student_dict[name]
            print("学生{}删除成功！".format(name))
        else:
            print("学生{}删除失败！，{}不存在".format(name, name))

    def modify_student(self):
        while True:
            try:
                name, age, phone = map(str, input("请输入要添加的学生信息(英文逗号隔开)：").split(','))
                flags = True
            except:
                print("输入错误，请输入：姓名,年龄,电话")
                flags = False
            if flags:
                break

        if name in self.__student_dict.keys():
            self.__student_dict[name] = (name, age, phone)
            print("学生{}修改成功！".format(name))
        else:
            print("学生{}修改失败！，{}不存在".format(name, name))

    def select_student_one(self):
        name = input("请输入要查询的学生姓名：")
        if name in self.__student_dict.keys():
            s_name, s_age, s_phone = self.__student_dict[name]
            print("学生{}查询成功，信息如下：\n姓名：{}\n年龄：{}\n电话：{}".format(s_name, s_name, s_age, s_phone))
        else:
            print("学生{}修改失败！，{}不存在".format(name, name))

    def select_student_all(self):
        for index, name in enumerate(self.__student_dict.keys()):
            s_name, s_age, s_phone = self.__student_dict[name]
            print("{}、姓名：{}\n年龄：{}\n电话：{}".format(index, s_name, s_age, s_phone))


if __name__ == '__main__':
    sms = StudentManagerSystem()
    sms.screen_info()