校园卡ATM机实现以及用户账号管理（Python，期末，大作业，小项目）

部分源代码：

# -*- coding: utf-8 -*-
#author :32301227, time：2024年1月1日11:12:06 version:1.0.0

import pandas as pd
def deleteID(userID):
    #删除账户
    print("--------------------------")
    for i in df.index :
        if df.at[i,"id"] == userID :
            if df.at[i,"wallet"] != 0 :
                print("余额尚不为 0 ，请先取款， 删除账户失败")
                print("--------------------------")
                return
            else :
                df.drop(index = i, inplace=True)
                print("您的账户",userID,"已删除")
                print("--------------------------")
                return

def changeID(userID):
    #修改账户ID
    print("--------------------------")
    newID = str(input("请输入新的账号: "))
    if newID in df['id'].values:
        print("该账号已存在，请输入一个新的账号")
        return
    for i in df.index :
        if df.at[i,"id"] == userID:
            df.loc[i,"id"] = newID
            
            print("修改账号成功")
            print("--------------------------")
            break
    return
def changePassword(userID):
    #修改密码
    print("--------------------------")
    if userID not in df['id'].values:
        print("该账号不存在")
        return
    newPassword = str(input("请输入新的密码: "))
    checkPassword = str(input("请再次输入密码： "))
    if newPassword == checkPassword :
        for i in df.index :
            if df.at[i,"id"] == userID:
                df.loc[i,"password"] = newPassword
                
                print("修改密码成功")
                print("--------------------------")
                return
    else :
        print("两次密码不一致，修改密码失败")
        print("--------------------------")
        return

def checkBalance(userID):
    #实现余额查询功能
    print("--------------------------")
    for i in df.index :
        if str(df.at[i,"id"]) == userID :
            print("您的余额是 : " , df.at[i,"wallet"] , " 元")
            print("--------------------------")
            break
    return
def withDraw(userID):
    #取款
    print("--------------------------")
    userInput = int(input("请输入取款金额： "))  
    for i in df.index :
        if df.at[i,"id"] == userID:
            if float(df.at[i,"wallet"]) < float(userInput):
                print("余额不足，取款失败")
                print("--------------------------")
                return
            df.at[i,"wallet"] -= userInput  # Subtract the withdrawal amount from the current balance
            print("取款成功，您的余额是 : ", df.at[i,"wallet"], " 元")
            print("--------------------------")
            return
def deposite(userID):
    #存款
    print("--------------------------")
    userInput = int(input("请存入： "))
    for i in df.index :
        if df.at[i,"id"] == userID:
            df.at[i,"wallet"] += userInput  # Add the deposit amount to the current balance
            print("您已成功存入" , userInput , " 元 ， 当前账户余额"   , df.at[i,"wallet"] ," 元" )
            print("--------------------------")
            return
    print("账号不存在，存款失败")
    print("--------------------------")
    return
def cardin():
    #登录，账号密码校验
    #成功则为账号，失败则为"0"
    print("--------------------------")
    userID = str(input("请输入你的学号： "))
    if userID not in df['id'].values:
        print("错误的账号或密码")
        print("--------------------------")
        return "0"
    userPassword = str(input("请输入你的密码： "))
    for i in df.index:
        if str(df.at[i,"id"]) == str(userID) and userPassword == df.at[i,"password"]:
            print("成功登录")
            print("--------------------------")
            return userID
    print("错误的账号或密码")
    print("--------------------------")
    return "0"

def newUser():
    #新建校园网账号
    print("--------------------------")
    newID = str(input("请输入你的学号： "))
    if newID in df['id'].values:
        print("该学号已存在，请输入一个新的学号")
        return
    newPassword = str(input("请设置一个密码： "))
    checkPassword = str(input("请再次输入密码： "))
    if newPassword == checkPassword:
        df.loc[df.shape[0]] = [newID, newPassword, 0]  # Add a new row to the DataFrame
        print("新账号创建成功")
        print("--------------------------")
        return
    else:
        print("两次密码不一致，新账号创建失败")
        print("--------------------------")
        return

def checkAdmin():
    #验证管理员账户
    print("--------------------------")
    adminPassword = "123456"
    userInput = str(input("请输入管理员密码： "))
    if userInput == adminPassword :
        return True
    print("管理员密码错误")
    print("--------------------------")
    return False

df = pd.read_excel("users.xlsx") #读取excel
flag = True
while(flag == True):
    try :   
        while(True):
            print("--------------------------")
            print("[1] 新建账户")
            print("[2] 登录账户&