파이썬(Python)은 온라인 쇼핑몰, 이체, 입출금 등의 기능을 구현한 신용카드 시스템이다.

1. 요구사항

2. 아이디어

1. 쇼핑 구매

신용카드 신용카드 사용 가능 잔액 받기

반품소비량

2. 신용카드(ATM) 카테고리

마지막 작업 후 신용카드 사용 가능 잔액, 총 부채, 남은 부채, 보증금 받기

이중 1. 거래 유형별로 별도로 자금을 처리하지 않으며, 별도의 장부를 기록하지도 않습니다. 각 거래 유형별로 자금을 처리하는 기능(입금 거래 유형, 거래 금액)을 호출합니다

2. 돈을 처리하는 함수는 구성 파일을 호출하여 거래 유형별로 가산, 차감, 이율을 적용합니다

이 작업 후 사용 가능한 신용카드 잔액, 총 부채, 남은 부채, 보증금으로 돌아가기

3. 고객

은행관리자 등록 및 로그인

일반회원 가입 및 로그인

전송 요구 사항: 등록, 로그인, 거래 유형, 거래 금액

4. 서버측

쇼핑 클래스를 호출하고 쇼핑 객체(쇼핑 인터페이스)를 생성합니다

신용카드(ATM) 클래스를 호출하여 상환, 이체 및 기타 업무 처리, 월간 이자를 기록하고 파일에 쓰기

5. 예약된 작업

프로그램을 정기적으로 실행하여 이자 계산을 해보세요.

3. 코드

3.1 구성 파일

import os
 
BASE_DIR = os.path.dirname(os.path.dirname(__file__)) #配置文件的上层目录
DB_DIR=os.path.join(BASE_DIR,'db')  #数据文件夹
ADMIN=os.path.join(DB_DIR,'admin')
ALL_USERS=os.path.join(DB_DIR,'allusrs')
A=os.path.join(BASE_DIR,'db','s')
LOG=os.path.join(BASE_DIR,'log')
 
 
TRANSACTION={
 'repay':{'action':'plus','interest':0}, #还款
 'withdraw':{'action':'minus','interest':0.05},#取现
 'transfer':{'action':'minus','interest':0.05},#转账
 'consume':{'action':'minus','interest':0},#消费
 'saving':{'action':'plus','interest':0} #存款
}
 

3.2 공개수업

3.2.1 쇼핑 카테고리

class buy:
 goods=[
   {"name": "电脑", "price": 1999},
   {"name": "鼠标", "price": 10},
   {"name": "游艇", "price": 20},
   {"name": "美女", "price": 998},
  ]
 
 def __init__(self,money,consumption,shopping_cart,):
  self.money=money
  self.consumption=consumption
  self.shopping_cart=shopping_cart
 
 def gouwu(self): #购物模块
  print('您的当前余额为：%d' %self.money)
  num=int(input('请输入商品序号：'))
  num-=1
  if self.goods[num]["name"] in self.shopping_cart.keys():    #goods[num]["name"]取商品名
   self.shopping_cart[self.goods[num]["name"]]['n']+=1     #商品数量+1
  else:
   self.shopping_cart[self.goods[num]["name"]]={"price":self.goods[num]["price"],'n':1,} # 创建购物车字典 {keys{"price"：价格,数量：1}}
  self.money-=self.shopping_cart[self.goods[num]["name"]]["price"]*self.shopping_cart[self.goods[num]["name"]]['n']  #单价*数量
  self.consumption+=self.shopping_cart[self.goods[num]["name"]]["price"]*self.shopping_cart[self.goods[num]["name"]]['n']
 
 def yichu(self): #移除购物车模块
  c=int(input(' 请输入0/1选择是否移除购物车商品, 移除请输入1:'))
  if c==1:
   e=int(input(' 请输入要移除的商品序号:'))
   d=self.goods[e-1]
   if d in self.shopping_cart.keys():    #判断要移除的商品是否在购物车内
    self.shopping_cart.remove(d)   #移除商品
    self.money=self.money+self.goods[self.goods.index(d)]["price"]    #余额增加
    self.consumption=self.consumption-self.goods[self.goods.index(d)]["price"] #消费总额减少
   else:
    print('商品不存在')
 def chongzhi(self): #充值模块
  pay=int(input('请输入充值金额'))
  self.money=self.money+pay
  print('您的当前余额为：%d' % self.money) #显示当前余额
 
 def main(self):
  print('商品清单：')
  for m,n in enumerate(self.goods,1):
   print(m)
   for v in n.values():
    print(v)
   print('=============')
  #消费总额清零
  self.consumption=0
  buy=True #定义默认一直购物
  while buy:
   price=0 #定义初始价格
   b=1 #定义默认不退出购物或充值状态
   if self.money>=price:
 
  #消费模块；金钱大于货物价格时，才能开始购物
    while self.money>=price:
  #计价模块，有钱就可以一直购物
     self.gouwu()
  #移除购物车商品模块
     self.yichu()
     if self.money>=0:
      print('您的当前余额为：%d' %self.money)   #显示当前余额
      b=int(input(' 请输入0/1选择是否继续购物, 购物请输入1:'))
      if b==0:  #
       break #退出计价模块
    if b==0:   #如果不购物
     break   #不购物退出整个购物程序
  #充值模块
   else:
    while self.money<price:   #金钱不足，可多次充钱，直到能买得起货物
     a=int(input(' 您的余额不足，请输入0/1选择是否充值，充值请输入1:'))
     if a==1:
      self.chongzhi()
     else:
      break   #退出充值模块
     if a==0:
      break   #不充值退出程序
  #打印购物车商品名、商品价格、消费总额、余额
  print('您的消费清单为：')
  for m,n in self.shopping_cart.items():
   print(m,n['price'],n['n'])
     #打印消费清单
   print('=============')
  print('您的当前余额为：%d,您的消费总额为：%d' % (self.money,self.consumption) )   #打印消费总额
  return self.consumption

3.2.2 신용카드 ATM

class Atm:
 credit=15000 #信用卡额度
 def __init__(self,balance,debt,remaining_debt,interest,saving,id):
  self.id=id    #信用卡id
  self.balance=balance  #信用卡可用金额
  self.debt=debt   #总欠款
  self.remaining_debt=remaining_debt #剩余欠款
  self.interest=interest  #手续费
  self.saving=saving  #存款
  self.now_time=time.strftime("%Y-%m-%d %H:%M:%S")
  self.now_data=time.strftime("%Y-%m")
  self.struct_time=time.gmtime(time.time())
  if self.struct_time.tm_mday>22:
   self.now_data=self.struct_time.tm_year+'-'+str(int(self.struct_time.tm_mon)+1)
 
 def account_info(self):#打印账户信息
  return '账户id%s 信用卡额度%s;信用卡可用金额%s;剩余欠款%s;'%(self.id,self.credit,self.balance,self.remaining_debt,)
 def ret_account_info(self):
  return [self.id,self.credit,self.balance,self.debt,self.remaining_debt,self.interest]
 def repay(self,amount):#还款
  self.handel_money('repay',amount)
 def withdraw(self,amount): #取现
  self.handel_money('withdraw',amount)
 def transfer(self,amount): #转账
  self.handel_money('transfer',amount)
 def consume(self,amount): #消费
  self.handel_money('consume',amount)
 def saves(self,amount):
  self.handel_money('saving',amount)
 def transaction(self,a,amount):
  dic={
   '1':self.repay,
   '2':self.withdraw,
   '3':self.transfer,
   '4':self.consume,
   '5':self.saves
  }
  print("debug: a:",type(a),"amount:",type(amount))
 
  print(a)
  print(dic[a])
  print(dic["5"])
  dic[a](amount)
  print("end debug")
 
 def handel_money(self,transaction,amount): #交易类型，
  amount=int(amount)
  interest=amount*settings.TRANSACTION[transaction]['interest'] #手续费计算
  if settings.TRANSACTION[transaction]['action']=='plus':
 
   if amount<=self.remaining_debt:
    self.remaining_debt-=amount
    self.balance+=amount
   else:
    self.balance+=self.remaining_debt
    self.remaining_debt=0
    self.saving+=amount-self.remaining_debt
  else:
 
   if self.saving<amount:
    self.saving=0
    a=amount-self.saving
    self.balance-=a+interest-self.saving
    # self.debt+=amount+interest
    self.remaining_debt+=a+interest
  a='time:%s id:%s transaction: %s amount:%s interest %s \n'%(self.now_time,self.id,transaction,amount,interest)
  print(a)
  mulu=os.path.join(settings.ALL_USERS,self.id)
  path_name_liushui=os.path.join(mulu,str(self.id)+'name_liushui',str(self.now_data))
 
  with open(path_name_liushui,'a')as f:   #记录流水信息
   f.write(a)
 
  s=[self.balance,self.debt,self.remaining_debt,self.interest,self.saving,]  #更新基本信息
  path_name_base=os.path.join(mulu,str(self.id)+'name_base')
  pickle.dump(s,open(path_name_base,'wb'))

3.3 서버측:

#!/usr/bin/env python
# -*- coding: utf-8 -*-
 
import sys,os
import hashlib
import pickle
import time
import socketserver
sys.path.append(os.path.dirname(os.path.dirname(__file__)))
from config import settings
from lib import modules
from lib.modules import *
 
class Myserver(socketserver.BaseRequestHandler):
 
 def md5(self,pwd):
  '''
  对密码进行加密
  :param pwd: 密码
  :return:
  '''
  hash=hashlib.md5(bytes('xx7',encoding='utf-8'))
  hash.update(bytes(pwd,encoding='utf-8'))
  return hash.hexdigest()
 
 
 def login(self,usrname,pwd,x):
  '''
  登陆
  :param usrname: 用户名
  :param pwd: 密码
  :return:是否登陆成功
  '''
  conn=self.request
  if x=='1':
   path_name_pwd=os.path.join(settings.ADMIN,usrname)
  else:
   mulu=os.path.join(settings.ALL_USERS,usrname)
   path_name_pwd=os.path.join(mulu,usrname+'name_pwd')
  s=pickle.load(open(path_name_pwd,'rb'))
  if usrname in s:
    if s[usrname]==self.md5(pwd):  #和加密后的密码进行比较
    return True
    else:
    return False
  else:
   return False
 
 
 def regist(self,usrname,pwd,x):
  '''
  注册
  :param usrname: 用户名
  :param pwd: 密码
  :return:是否注册成功
  '''
 
  conn=self.request
  if x=='1':
   mulu=os.path.join(settings.ADMIN,usrname)
  else:
   mulu=os.path.join(settings.ALL_USERS,usrname)
 
 
  if os.path.exists(mulu):
    return False
  else:
   os.mkdir(mulu)
   s={}
   s[usrname]=self.md5(pwd)
   path_name_pwd=os.path.join(mulu,usrname+'name_pwd')
   pickle.dump(s,open(path_name_pwd,'wb'))
   path_name_base=os.path.join(mulu,usrname+'name_base')
   pickle.dump([15000,{},0,0,0],open(path_name_base,'wb'))
   path_name_liushui=os.path.join(mulu,usrname+'name_liushui')
   os.mkdir(path_name_liushui)
   return True
 
 def user_identity_authentication(self,usrname,pwd,ret,x):
  '''
  判断注册和登陆，并展示用户的详细目录信息，支持cd和ls命令
  :return:
  '''
  conn=self.request
  if ret=='1':
   r=self.login(usrname,pwd,x)
   if r:
    conn.sendall(bytes('y',encoding='utf-8'))
   else:
    conn.sendall(bytes('n',encoding='utf-8'))
  elif ret=='2':
   # print(usrname,pwd)
   if x=='1':
    r=self.regist(usrname,pwd,x)
   else: #用户注册
    s=[0,1]
    pickle.dump(s,open(settings.A,'wb'))
    while True:
     ret=pickle.load(open(settings.A,'rb'))
     if ret[0]==0:
      time.sleep(30)
      continue
     elif ret[0]==1 or ret[0]==2:
      break #默认值已更改，银行管理员已操作
 
    if ret[0]==1: #如果管理员同意
     r=self.regist(usrname,pwd,x)
    else:
     r=0
    s=[0,0]
    pickle.dump(s,open(settings.A,'wb'))
   if r:
    conn.sendall(bytes('y',encoding='utf-8'))
   else:
    conn.sendall(bytes('n',encoding='utf-8'))
 def interactive(self,usrname): #进行交互
  conn=self.request
  while True:
   c=conn.recv(1024) #接收用户交互选项
   r=str(c,encoding='utf-8')
   mulu=os.path.join(settings.ALL_USERS,usrname)
   path_name_base=os.path.join(mulu,usrname+'name_base')
   s=pickle.load(open(path_name_base,'rb'))
 
   #打印账户信息
   obj=modules.Atm(s[0],s[1],s[2],s[3],s[4],usrname) #Atm对象
   a=obj.account_info() #接收账户信息
   conn.sendall(bytes(a,encoding='utf-8'))
 
   b=obj.ret_account_info()
 
 
 
   if r== '4':
    buy_obj=modules.buy(b[2],0,{})
    amount=buy_obj.main()
   elif r=='q':
    break
   else:
    s=conn.recv(1024)
    amount=str(s,encoding='utf-8')
 
   obj.transaction(r,amount)
 
 
  pass
 
 
 def handle(self):
  conn=self.request
  x=conn.recv(1024)
  x=str(x,encoding='utf-8')
  conn.sendall(bytes('收到用户类别',encoding='utf-8'))
  while True:
   if x=='1' or x=='2':
    b=conn.recv(1024)
    ret=str(b,encoding='utf-8')
    conn.sendall(bytes('b ok',encoding='utf-8'))
    c=conn.recv(1024)
    r=str(c,encoding='utf-8')
    usrname,pwd=r.split(',')
    print(usrname,pwd)
    self.user_identity_authentication(usrname,pwd,ret,x) #登陆或注册验证
    if x=='2':#普通用户身份验证成功后
     self.interactive(usrname)
 
     pass
 
    break
   elif x=='q':
    break
 
if __name__=='__main__':
 sever=socketserver.ThreadingTCPServer(('127.0.0.1',9999),Myserver)
 sever.serve_forever()

3.4 클라이언트

#!/usr/bin/env python
# -*- coding: utf-8 -*-
'''
本程序作为用户或银行管理员的入口，其中c=1代表银行管理员，c=2代表普通用户
'''
import pickle
import sys
import time
import os
import socket
sys.path.append(os.path.dirname(os.path.dirname(__file__)))
from config import settings
from lib import *
from lib.modules import *
 
def login(usrname,pwd):
 '''
 登陆
 :param usrname:用户名
 :param pwd:密码
 :return:是否登陆成功
 '''
 obj.sendall(bytes(usrname+','+pwd,encoding='utf-8'))
 ret=obj.recv(1024)
 r=str(ret,encoding='utf-8')
 if r=='y':
  return 1
 else:
  return 0
 
def regist(usrname,pwd,x):
 '''
 注册
 :param usrname:用户名
 :param pwd:密码
 :return:是否注册成功
 '''
 obj.sendall(bytes(usrname+','+pwd,encoding='utf-8'))
 
 ret=obj.recv(1024)
 r=str(ret,encoding='utf-8')
 if r=='y':
  return 1
 else:
  return 0
def user_identity_authentication(usrname,pwd,x):
 '''
 选择登陆或注册，展示用户的详细目录信息，支持cd和ls命令
 :return:
 '''
 a=input('请选择1.登陆 2.注册')
 obj.sendall(bytes(a,encoding='utf-8'))
 obj.recv(1024)
 if a=='1':
  ret=login(usrname,pwd)
  if ret:
   print('登陆成功')
   return 1
  else:
   print('用户名或密码错误')
   return 0
 elif a=='2':
  ret=regist(usrname,pwd,x)
  if ret:
   print('注册成功')
   return 1
  else:
   print('用户名已存在或银行管理员拒绝')
   return 0
def main(x):
 usrname=input('请输入用户名')
 pwd=input('请输入密码')
 if user_identity_authentication(usrname,pwd,x): #如果验证身份成功
  if x=='1': #处理用户注册信息
 
   while True:
    s=pickle.load(open(settings.A,'rb'))
    if s[1]==0:
     time.sleep(30)
     continue
    elif s[1]==1:
     while True:
      a=input('用户请求注册，输入1同意，2拒绝')
      if a=='1':
       s=[1,0]
       pickle.dump(s,open(settings.A,'wb'))
       break
      elif a=='2':
       s=[2,0]
       pickle.dump(s,open(settings.A,'wb'))
       break
      else:
       print('输入有误')
     break
  else: #普通用户登陆后
   interactive() #进行交互
 
 
def interactive():
 while True:
  a=input('请选择 1.还款 2.取现 3.转账 4.消费 5.存钱 q退出')
  obj.sendall(bytes(a,encoding='utf-8'))
  r=obj.recv(1024) #接收账户信息
  ret=str(r,encoding='utf-8')
  print(ret)
  if a !='4'and a !='q':
   b=input('请输入金额')
   obj.sendall(bytes(b,encoding='utf-8'))
  elif a=='q':
   break
 
 
 
obj=socket.socket() #创建客户端socket对象
obj.connect(('127.0.0.1',9999))
while True:
 x=input('请选择1.银行管理员 2.用户 q、退出')
 obj.sendall(bytes(x,encoding='utf-8'))
 obj.recv(1024) #确认收到用户类别
 if x=='1' or x=='2':
  main(x)
  break
 elif x=='q':
  break
 else:
  print('输入有误请重新输入')
 
obj.close()

3.5 예약된 작업

#!/usr/bin/env python
# -*- coding:utf-8 -*-
import os,sys
import json,pickle
import time
sys.path.append(os.path.dirname(os.path.dirname(__file__)))
from config import settings
 
 
 
def main():
 card_list = os.listdir(settings.ALL_USERS)
 for card in card_list:
  basic_info = pickle.load(open(os.path.join(settings.ALL_USERS, card, card+'name_base')))
  struct_time = time.localtime()
 
  # 循环账单列表，为每月的欠款计息。并写入到当月账单中
  for item in basic_info['debt']:
   interest = item['total_debt'] * 0.0005
   if basic_info[4] >= interest:
    basic_info[4] -= interest
   else:
    temp = interest - basic_info[4]
    basic_info[4]=0
    basic_info[0] -= temp
    pickle.dump(
      basic_info,
      open(os.path.join(settings.ALL_USERS, card, card+'name_base'),'w')
    )
 
  # 如果当前等于10号(9号之前)
  # 当前余额为负值，则将值添加到账单列表中，开始计息，同时，本月可用额度恢复。
  date = time.strftime("%Y-%m-%d")
  if struct_time.tm_mday == 11 and basic_info[2]>0:
   dic = {'date': date,
     "total_debt": basic_info[2],
     "balance_debt": basic_info[2],
     }
   basic_info[1].append(dic)
   # 恢复可用额度
   basic_info[0] = 15000
  pickle.dump(
   basic_info,
   open(os.path.join(settings.ALL_USERS, card, card+'name_base'),'w')
    )
 
 
def run():
 main()
　　

위 내용은 Python을 이용하여 온라인 쇼핑몰 신용카드 시스템을 개발한 내용입니다. 도움이 필요한 학생들은 참고하시면 됩니다.