python实现银行账户系统

import math
import re

def main(): # 主函数
 select = True
 while (select):
 menu()
 start_int = input("请选择你您想要操作功能的序号：")
 if start_int == "12":
 select = False
 print("你已经退出系统欢迎下次在来")
 elif start_int == "4":
 insert()
 elif start_int == "5":
 login()
 elif start_int == "6":
 show()
 elif start_int == "11":
 delete()
 elif start_int == "7":
 revise()
 elif start_int == "8":
 deposit()
 elif start_int == "9":
 getMoney()
 elif start_int == "10":
 UseMoney()



def menu(): # 菜单显示
 print("1========银行存取钱系统========")
 print("2===========================")
 print("3===========功能菜单===========")
 print("4=========注册个人信息==========")
 print("5============登入=============")
 print("6=========查询个人信息==========")
 print("7=========修改个人账户==========")
 print("8============存钱=============")
 print("9============取钱=============")
 print("10=========显示年收益==========")
 print("11========注销个人信息==========")
 print("12===========退出=============")


filename = "Bank.txt" # 定义保存用户信息的文件名

def save(Bank): # 创建文件方法
 try:
 Bank_txt = open(filename, "a")
 except Exception as e:
 Bank_txt = open(filename, "w")
 for info in Bank:
 Bank_txt.write(str(info) + "\n")
 Bank_txt.close()


def insert(): # 注册方法
 BankList = [] # 保存用户信息列表
 mark = True # 是否继续添加
 while mark:
 id = input("请输入您的ID密码（如1001）：")
 if not id:
 break
 name = input("请输入姓名")
 if not name:
 break
 try:
 deposit = int(input("输入你要存款的金额"))
 if deposit == 0:
 break
 except:
 print("输入无效，不是输入整型数，请重新输入")
 continue
 Bank = {"id": id, "name": name, "deposit": deposit}
 BankList.append(Bank)
 mark = False
 save(BankList)
 print("注册成功")


global g_select
g_select = 0
global Username
global Userpassword


def login(): # 登入方法
 global Username
 global g_select
 global g_BankQuery
 global Userpassword
 g_BankQuery = []
 Username = str(input("请输入您的用户名"))
 Userpassword = str(input("请输入您的密码"))
 file = open(filename, 'r')
 Bank = file.readlines() # 读取全部内容
 for list in Bank:
 d = dict(eval(list)) # 字符转化为字典
 if d['name'] == Username and d['id'] == Userpassword:
 g_BankQuery.append(d)
 print("登入成功！")
 g_select = 1
 else:
 pass
 if not g_BankQuery:
 g_select = 0
 print("登入失败请先注册！")
 else:
 pass




def show(): # 查询个人信息
 if g_select == 1:
 format_title = "{:^6}{:^12}"
 print(format_title.format("名字", "存款"))
 format_date = "{:^6}{:^12}"
 for info in g_BankQuery:
 print(format_date.format(str(info.get('name')), str(info.get('deposit'))))
 else:
 print("请先登入！")


def delete(): # 删除个人账户方法
 global g_BankQuery
 cz = []
 global g_select
 choose = 0
 if g_select == 1:
 while choose  3:
 username = str(input("请输入你姓名"))
 userpassword = str(input("请输入您的密码"))
 file = open(filename, 'r')
 Bank = file.readlines() # 读取全部内容
 for list in Bank:
 d = dict(eval(list)) # 字符转化为字典
 if d['name'] == username and d['id'] == userpassword:
  cz.append(d)
  file.close()
  choose = 3
  NewBank = open(filename, 'w') # 以写的方式打开文件
  for list2 in Bank:
  d2 = dict(eval(list2)) # 字符转化为字典
  if d2['name'] != username and d2['id'] != userpassword:
  NewBank.write(str(d2) + "\n")
  else:
  pass
 else:
  pass
 if not cz:
 choose = choose + 1
 if choose == 3:
  g_select = 0
  print("请重新登入！")
 else:
  print("用户名或者密码错误，请重新输入你还有：" + str(3 - choose) + "机会")
 else:
 g_BankQuery.clear()
 g_select = 0
 print("您的个人信息已经注销")

 else:
 print("请先登入！")

def revise(): # 修改个人账户方法
 cz = []
 global g_select
 if g_select == 1:
 username = input("请输入您的用户名：")
 userpassword = input("请输入您的密码：")
 file = open(filename, 'r')
 Bank = file.readlines() # 读取全部内容
 for list in Bank:
 d = dict(eval(list)) # 字符转化为字典
 if d['name'] == username and d['id'] == userpassword:
 cz.append(d)
 file.close()
 NewBank = open(filename, 'w') # 以写的方式打开文件
 for list2 in Bank:
  d2 = dict(eval(list2)) # 字符转化为字典
  if d2['name'] == username and d2['id'] == userpassword:
  d2['name'] = input("输入您的新名字：")
  d2['id'] = input("输入您的新密码：")
  NewBank.write(str(d2) + "\n")
  print("修改成功，请重新登入!")
  g_select = 0
  else:
  NewBank.write(str(d2) + "\n")
 else:
 pass
 if not cz:
 print("你输入的密码或者用户名有误请重新登入")
 g_select = 0
 else:
 pass
 else:
 print("请先登入！")

def deposit(): # 存钱方法
 global g_BankQuery
 global g_select
 cz = []
 if g_select == 1:
 money = int(input("请输入你要存多少钱："))
 file = open(filename, 'r')
 Bank = file.readlines() # 读取全部内容
 for list in Bank:
 d = dict(eval(list)) # 字符转化为字典
 if d['name'] == Username and d['id'] == Userpassword:
 cz.append(d)
 file.close()
 NewBank = open(filename, 'w') # 以写的方式打开文件
 for list2 in Bank:
  d2 = dict(eval(list2)) # 字符转化为字典
  if d2['name'] == Username and d2['id'] == Userpassword:
  d2['deposit'] = str(int(d2['deposit']) + money)
  NewBank.write(str(d2) + "\n")
  print("储存成功!")
  g_BankQuery.clear()
  g_BankQuery.append(d2)
  else:
  NewBank.write(str(d2) + "\n")
 else:
 pass
 else:
 print("请先登入！")

def getMoney(): # 取钱方法
 global g_select
 global g_BankQuery
 cz = []
 if g_select == 1:
 money = int(input("请输入你要取多少钱："))
 file = open(filename, 'r')
 Bank = file.readlines() # 读取全部内容
 for list in Bank:
 d = dict(eval(list)) # 字符转化为字典
 if d['name'] == Username and d['id'] == Userpassword:
 cz.append(d)
 if money > int(d['deposit']):
  print("您的余额不足")
 else:
  file.close()
  NewBank = open(filename, 'w') # 以写的方式打开文件
  for list2 in Bank:
  d2 = dict(eval(list2)) # 字符转化为字典
  if d2['name'] == Username and d2['id'] == Userpassword:
  d2['deposit'] = str(int(d2['deposit']) - money)
  NewBank.write(str(d2) + "\n")
  print("取钱成功!")
  g_BankQuery.clear()
  g_BankQuery.append(d2)
  else:
  NewBank.write(str(d2) + "\n")
 else:
 pass
 else:
 print("请先登入！")


def UseMoney(): # 利息计算
 UM = True
 while UM:
 try:
 money = float(input("请输入你要投资理财多少钱："))
 year = int(input("请你输入你要储存多少年："))
 except:
 print("请你输入整数年份！")
 if 0  year = 3:
 profitmargin = 0.03
 elif 3  year = 5:
 profitmargin = 0.04
 elif 5  year = 10:
 profitmargin = 0.06
 elif year > 10:
 profitmargin = 0.08
 if money  0 or year = 0:
 print("您的本金不能少于0元或者年份不能少于0年")
 else:
 UM = False
 profit = round(money * year * profitmargin, 3)
 print("你储存：" + str(year) + "年将获得的利润会等于：" + str(profit) + "元本金加利润会等于：" + str(profit + money) + "元")


if __name__ =="__main__":