**学员信息管理实现增改删查**

学员信息管理实现增改删查

import os
def ex_student(args):
    re_s = open("student.txt", "w", encoding="utf-8")
    for res in args:
        re_s.write(res)
def re_student(args):
    re_s = open("student.txt", "w", encoding="utf-8")
    for res in args:
        re_s.write(res)

def add_student():
    num=input("请输入你的学号：")
    name = input("请输入你的姓名：")
    sex = input("请输入你的性别")
    phone = input("请输入你的电话号码：")
    addr = input("请输入你的地址")
    add = name + " " + sex + " " + phone + " " + addr + "\n"
    return add

print("***********学员管理系统***********")
a=input("请选择你要操作的项目:(增加学员，删除学员信息，修改学员信息，查询学员信息):")

if a=="增加学员":
    add_s=open("student.txt","a",encoding="utf-8")
    add=add_student()
    add_s.write(add)
elif a=="删除学员":
    name1=input("请选择你要删除的学员姓名：")
    handle=open("student.txt","r",encoding="utf-8")
    handle_read=handle.readlines()
    #print(handle_read)
    for i in range(len(handle_read)-1):
        res=handle_read[i].find(name1)
        if res==0:
            handle_read.remove(handle_read[i])
            #print(handle_read)
            re_student(handle_read)
elif a=="查询学员信息":
    mess=input("请输入你要查询的项目：")
    handle = open("student.txt", "r", encoding="utf-8")
    handle_read = handle.readlines()
    for s in handle_read:
        res=s.find(mess)
        if res==0:
            print(s)
elif a=="修改学员信息":
    ex_name = input("请选择你要修改的学员姓名：")
    handle = open("student.txt", "r", encoding="utf-8")
    handle_read = handle.readlines()
    # print(handle_read)
    for i in range(len(handle_read) - 1):
        res = handle_read[i].find(ex_name)
        if res == 0:
            print("修改前的学员信息：",handle_read[i])
            ex_name1=add_student()
            print("修改后的数据：",ex_name1)
            handle_read[i]=ex_name1
            ex_student(handle_read)