ATM+购物车项目

ATM + 购物车
https://www.cnblogs.com/kermitjam/articles/10687180.html

readme 内容
前戏: 一个项目是如何从无到有的.

一 需求分析
    对项目需求进行分析,并提取出相应的功能.

    - 额度15000或自定义  ---> 注册功能

    - 实现购物商城，买东西加入购物车，调用信用卡接口结账  ---> 购物车, 支付功能

    - 可以提现，手续费5%  ---> 提现

    - 支持多账户登录  ---> 登陆

    - 支持账户间转账   ---> 转账

    - 记录每月日常消费流水  ---> 记录流水

    - 提供还款接口  ---> 还款

    - ATM记录操作日志  ---> 日志功能

    - 提供管理接口，包括添加账户、用户额度，冻结账户等...  ---> 管理员功能

    - 用户认证功能  ---> 登陆认证,使用装饰器

二 程序的架构设计
    用户功能层:
        负责接收用户输入的内容,并返回结果给用户.
        做一些小的逻辑判断.

    接口层:
        处理业务逻辑.

    数据处理层:
        对文件进行处理.
        增,删,查,改操作.

    三层架构的好处:
        1.代码结构清晰
        2.可扩展性强.
        3.易维护,管理.


三 分任务开发
    - CTO
        - 技术总监
            - 架构师
                - 项目经理
                    - 普通开发
                        UI: 用户界面设计师
                        前端: 网页的开发
                        后端: 写业务逻辑,写接口
                        测试: 测试软件
                        运维: 部署项目.

四 测试
    - 手动测试
        传统人工去手动测试.

    - 自动化测试
        通过脚本模拟人的行为,自动化执行测试.

    - 黑盒测试:
        对用户界面进行测试.

    - 白盒测试:
        对软件的性能进行测试,例如每分钟能接收多少并发量.

五 上线运行
    把测试好的代码交给运维人员, 部署上线.

 conf/settings

import os

BASE_PATH = os.path.dirname(os.path.dirname(__file__))
DB_PATH = os.path.join(BASE_PATH,'db')

# 定义三种日志输出格式 开始
standard_format = '[%(asctime)s][%(threadName)s:%(thread)d][task_id:%(name)s][%(filename)s:%(lineno)d]' 
                  '[%(levelname)s][%(message)s]' #其中name为getlogger指定的名字

simple_format = '[%(levelname)s][%(asctime)s][%(filename)s:%(lineno)d]%(message)s'

id_simple_format = '[%(levelname)s][%(asctime)s] %(message)s'

# 定义日志输出格式 结束
# ****************注意1: log文件的目录
BASE_PATH = os.path.dirname(os.path.dirname(__file__))
logfile_dir = os.path.join(BASE_PATH, 'log')
# print(logfile_dir)

# ****************注意2: log文件名
logfile_name = 'atm_shop_log.log'

# 如果不存在定义的日志目录就创建一个
if not os.path.isdir(logfile_dir):
    os.mkdir(logfile_dir)

# log文件的全路径
logfile_path = os.path.join(logfile_dir, logfile_name)

# ****************注意3: log配置字典
LOGGING_DIC = {
    'version': 1,
    'disable_existing_loggers': False,
    'formatters': {
        'standard': {
            'format': standard_format
        },
        'simple': {
            'format': simple_format
        },
    },
    'filters': {},
    'handlers': {
        #打印到终端的日志
        'console': {
            'level': 'DEBUG',
            'class': 'logging.StreamHandler',  # 打印到屏幕
            'formatter': 'simple'
        },
        # 打印到文件的日志,收集info及以上的日志
        'default': {
            'level': 'DEBUG',
            'class': 'logging.handlers.RotatingFileHandler',  # 保存到文件
            'formatter': 'standard',
            'filename': logfile_path,  # 日志文件
            'maxBytes': 1024*1024*5,  # 日志大小 5M
            'backupCount': 5,
            'encoding': 'utf-8',  # 日志文件的编码，再也不用担心中文log乱码了
        },
    },
    'loggers': {
        #logging.getLogger(__name__)拿到的logger配置
        '': {
            'handlers': ['default', 'console'],  # 这里把上面定义的两个handler都加上，即log数据既写入文件又打印到屏幕
            'level': 'DEBUG',
            'propagate': True,  # 向上（更高level的logger）传递
        },
    },
}

core/src

from interface import user_interface
from lib import common
from interface import bank_interface
from interface import shop_interface
from interface import admin_interface

user_online={'user':None}
def register():
    print('注册功能')
    while True:
        inp_username=input('请输入用户名:').strip()
        flag=user_interface.check_user_interface(inp_username)
        if flag:
            print('用户已存在,请重新输入')
            continue

        inp_pwd=input('请输入密码:').strip()
        re_pwd=input('请再次输入密码:').strip()
        if inp_pwd==re_pwd:
            msg=user_interface.register_interface(inp_username,inp_pwd)
            if msg:
                print(msg)
                break
            else:
                print('注册失败')
        else:
            print('两次密码不一致！')


def login():
    while True:
        inp_username = input('请输入用户名').strip()
        flag=user_interface.check_user_interface(inp_username)
        if not flag:
            print('用户不存在')
            continue
        inp_pwd = input('请输入密码').strip()
        flag,msg = user_interface.login_interface(inp_username,inp_pwd)
        if flag:
            print(msg)
            user_online['user']=inp_username
            break
        else:
            print(msg)



#查看余额
@common.login_auth
def check_bal():
    print('查看余额')
    bal = user_interface.check_bal_interface(user_online['user'])
    print('余额为: ',bal)


#提现
@common.login_auth
def withdraw():
    while True:
        money = input('请输入提现金额(按q退出):').strip()
        if money == 'q':
            break
        if not money.isdigit():
            print('请输入数字!')
            continue
        money = int(money)
        flag,msg = bank_interface.withdraw_interface(user_online['user'],money)
        if flag:
            print(msg)
            break
        else:
            print(msg)


@common.login_auth
def repay():
    while True:
        money = input('请输入还款金额(按q退出):').strip()
        if money == 'q':
            break
        if not money.isdigit():
            print('请输入数字!')
            continue
        money = int(money)
        flag, msg = bank_interface.repay_interface(user_online['user'], money)
        if flag:
            print(msg)
            break

# 转账
@common.login_auth
def transfer():
    while True:
        to_user = input('请输入转账目标用户(输入q退出):').strip()
        if to_user == 'q':
            break
        if to_user == user_online['user']:
            print('自己不可以给自己转账!')
            continue
        flag = user_interface.check_user_interface(to_user)
        if not flag:
            print('用户不存在!')
            continue
        money = input('请输入转账金额:').strip()
        if not money.isdigit():
            print('请输入数字!')
            continue
        money = int(money)
        flag,msg=bank_interface.transfer_interface(to_user,user_online['user'],money)
        if flag:
            print(msg)
            break
        else:
            print(msg)

# 查看流水
@common.login_auth
def check_flow():
    flow_list = bank_interface.check_flow_interface(user_online['user'])
    for flow in flow_list:
        print(flow)

# 购物
@common.login_auth
def shopping():
    good_list = [
        ['Tesla',500],
        ['宝马',350],
        ['奔驰',400],
        ['奥迪',300],
        ['mazda',200]
    ]
    user_bal=user_interface.check_bal_interface(user_online['user'])
    shop_cart = shop_interface.check_shop_cart_interface(user_online['user'])
    cost = 0
    for i in range(len(good_list)):
        if shop_cart.get(good_list[i][0]):    # 若存在,计算购物车价格
            cost += shop_cart[good_list[i][0]] * good_list[i][1]

    while True:
        for index,price in enumerate(good_list):
            print(index,price)
        choice = input('请输入商品编号(输入q退出):').strip()
        if choice == 'q':
            print(f'购物车为{shop_cart},余额为{user_bal},总费用为{cost}')
            cmd = input('是否结账,请输入y/n:').strip()
            if cmd =='y':
                flag,msg = shop_interface.buy_interface(user_online['user'],cost)
                if flag:
                    print(msg)
                    print(f'已购买{shop_cart},余额为{user_bal-cost},总费用为{cost}')
                    break
                else:
                    print(msg)
            elif cmd =='n':
                flag,msg=shop_interface.add_shop_cart_interface(user_online['user'],shop_cart)
                if flag:
                    print(msg)
            break
        elif not choice.isdigit():
            print('输入必须为数字!')
            continue
        elif choice in [f'{i}' for i in range(len(good_list))]:
            good_name,good_price = good_list[int(choice)]
            if user_bal > cost + good_price:
                if good_name in shop_cart:
                    shop_cart[good_name] += 1
                else:
                    shop_cart[good_name] = 1
                cost += good_price
            else:
                print('金额不足')
            print(f'购物车为{shop_cart},余额为{user_bal},总费用为{cost}')

        else:
            print('输入不在范围内')
            continue



# 参看购物车
@common.login_auth
def check_shop_cart():
    shop_cart = shop_interface.check_shop_cart_interface(user_online['user'])
    if not shop_cart:
        print('购物车是空的,请选择购物车功能')
    print(shop_cart)
    while shop_cart != {}:  # 若购物车不为空
        cmd = input('是否清空购物车,输入y/n')
        if cmd == 'y':
            flag,msg=shop_interface.clear_shop_cart_interface(user_online['user'])
            if flag:
                print(msg)
                break
        elif cmd == 'n':
            break
        else:
            print('输入格式不正确')
# 注销
@common.login_auth
def logout():
    flag,msg = user_interface.logout_interface()
    if flag:
        print(msg)

#冻结账户
def lock_user():
    print('冻结用户')
    user= input('请输入要冻结的用户：').strip()
    flag=user_interface.check_user_interface(user)
    if flag:
        msg = admin_interface.lock_interface(user)
        print(msg)
    else:
        print('目标用户不存在')
#解冻用户
def unlock_user():
    print('解冻用户')
    user = input('请输入要解结的用户：').strip()
    flag = user_interface.check_user_interface(user)
    if flag:
        msg = admin_interface.unlock_interface(user)
        print(msg)
    else:
        print('目标用户不存在')

#修改用户额度
def change_limit():
    print('修改用户额度')
    user = input('请输入需要修改额度的用户：').strip()
    flag = user_interface.check_user_interface(user)
    if not flag:
        print('用户不存在')
        return
    limit = input('请输入要修改的额度').strip()
    if limit.isdigit():
        limit = int(limit)
        msg=admin_interface.change_limit_interface(user,limit)
        print(msg)
    else:
        print('请输入数字')


admin_func_dic={
    '1':lock_user,
    '2':unlock_user,
    '3':change_limit
}
@common.login_auth
def admin_sys():
    while True:
        print('''
        1.冻结用户
        2.解冻用户
        3.用户额度
        ''')
        choice = input('请输入管理员功能(按q退出):').strip()
        if choice == 'q':
            break
        elif choice not in admin_func_dic:
            print('请重新输入')
            continue
        else:
            admin_func_dic[choice]()

func_dic = {
    '1':register,
    '2':login,
    '3':check_bal,
    '4':withdraw,
    '5':repay,
    '6':transfer,
    '7':check_flow,
    '8':shopping,
    '9':check_shop_cart,
    '10':logout,
    '11':admin_sys
}
def run():
    while True:
        print('''
        1.注册
        2.登陆
        3.查看余额
        4.提现
        5.还款
        6.转账
        7.查看流水
        8.购物车功能
        9.查看购物车(可清空)
        10.注销
        11.管理员功能
        ''')
        choice = input('请输入功能编号(按q退出):').strip()
        if choice =='q':
            break
        elif choice in func_dic:
            func_dic[choice]()
        else:
            print('请输入正确编号')

db/db_handler

import json
import os
from conf import settings

def save(user_dic):
    user_path = f'{settings.DB_PATH}/{user_dic["user"]}.json'
    with open(user_path,'w',encoding='utf8')as f:
        json.dump(user_dic,f,ensure_ascii=False)

def select(user):
    user_path = f'{settings.DB_PATH}/{user}.json'
    if os.path.exists(user_path):
        with open(user_path,'r',encoding='utf8')as f:
            user_dic=json.load(f)
            return user_dic

自动生成的ldc.json文件内容

[2019-11-22 19:15:15,294][MainThread:19088][task_id:user][user_interface.py:37][INFO][ldc用户登陆成功!]
[2019-11-22 19:16:02,424][MainThread:19088][task_id:bank][bank_interface.py:53][INFO][ldc用户给zxc转账120元]
[2019-11-22 19:16:12,150][MainThread:19088][task_id:bank][bank_interface.py:34][INFO][[ldc]用户参看流水]
[2019-11-22 19:16:19,305][MainThread:19088][task_id:user][user_interface.py:45][INFO][ldc参看余额!]
[2019-11-22 19:16:19,307][MainThread:19088][task_id:shop][shop_interface.py:10][INFO][ldc查看了购物车]
[2019-11-22 19:17:02,286][MainThread:19088][task_id:bank][bank_interface.py:67][INFO][ldc用户支付400成功]
[2019-11-22 19:17:02,290][MainThread:19088][task_id:shop][shop_interface.py:19][INFO][ldc购买成功]
[2019-11-22 19:17:20,777][MainThread:19088][task_id:user][user_interface.py:45][INFO][ldc参看余额!]
[2019-11-22 19:17:20,778][MainThread:19088][task_id:shop][shop_interface.py:10][INFO][ldc查看了购物车]
[2019-11-22 19:19:32,075][MainThread:19088][task_id:bank][bank_interface.py:67][INFO][ldc用户支付0成功]
[2019-11-22 19:19:32,079][MainThread:19088][task_id:shop][shop_interface.py:19][INFO][ldc购买成功]
[2019-11-22 19:19:57,101][MainThread:19088][task_id:admin][admin_interface.py:24][INFO][修改用户ldc额度成功]
[2019-11-22 23:31:16,539][MainThread:2176][task_id:user][user_interface.py:24][INFO][qwe用户注册成功!]
[2019-11-22 23:31:26,546][MainThread:2176][task_id:user][user_interface.py:37][INFO][zxc用户登路成功!]
[2019-11-22 23:31:39,420][MainThread:2176][task_id:bank][bank_interface.py:53][INFO][zxc用户给qwe转账100元]
[2019-11-22 23:31:53,696][MainThread:2176][task_id:bank][bank_interface.py:34][INFO][[zxc]用户参看流水]
[2019-11-22 23:32:39,981][MainThread:2176][task_id:user][user_interface.py:45][INFO][zxc参看余额!]
[2019-11-22 23:32:39,985][MainThread:2176][task_id:shop][shop_interface.py:10][INFO][zxc查看了购物车]
[2019-11-22 23:33:01,157][MainThread:2176][task_id:bank][bank_interface.py:67][INFO][zxc用户支付1500成功]
[2019-11-22 23:33:01,160][MainThread:2176][task_id:shop][shop_interface.py:19][INFO][zxc购买成功]
[2019-11-22 23:33:16,300][MainThread:2176][task_id:user][user_interface.py:53][INFO][zxc注销!]

interface/admin_interface

from db import db_handler
from lib import common

user_logger=common.get_logger('admin')

def lock_interface(user):
    user_dic = db_handler.select(user)
    user_dic['lock'] = True
    db_handler.save(user_dic)
    user_logger.info(f'{user}用户冻结成功')
    return f'{user}用户冻结成功'

def unlock_interface(user):
    user_dic = db_handler.select(user)
    user_dic['lock'] = False
    db_handler.save(user_dic)
    user_logger.info(f'{user}用户解冻成功')
    return f'{user}用户解冻成功'

def change_limit_interface(user,limit):
    user_dic = db_handler.select(user)
    user_dic['balance']=limit
    db_handler.save(user_dic)
    user_logger.info(f'修改用户{user}额度成功')
    return f'修改用户{user}额度成功'

interface/bank_interface

from db import db_handler
from lib import common

user_loggor = common.get_logger('bank')

# 提现接口
def withdraw_interface(user,money):
    user_dic = db_handler.select(user)
    if user_dic['balance'] >= money*1.05:
        user_dic['balance'] -= money*1.05
        msg = f'[{user}]用户提现[{money}元,手续费[{money * 0.05}]元]'
        user_dic['flow'].append(msg)

        db_handler.save(user_dic)
        user_loggor.info(f'[{user}]用户提现[{money}元,手续费[{money * 0.05}]元]')
        return True,msg
    else:
        user_loggor.info(f'[{user}]用户提现余额不足')
        return False,'余额不足'

# 还款接口
def repay_interface(user, money):
    user_dic = db_handler.select(user)
    user_dic['balance'] += money
    msg = f'[{user}]用户还款[{money}元]'
    user_dic['flow'].append(msg)
    db_handler.save(user_dic)
    user_loggor.info(f'[{user}]用户还款[{money}元]')
    return True,msg

# 参看流水接口
def check_flow_interface(user):
    user_dic=db_handler.select(user)
    user_loggor.info(f'[{user}]用户参看流水')
    return user_dic['flow']

def transfer_interface(to_user,from_user,money):
    to_user_dic = db_handler.select(to_user)
    from_user_dic = db_handler.select(from_user)

    if from_user_dic['balance'] >= money:
        from_user_dic['balance'] -= money
        to_user_dic['balance'] += money
        # 流水信息
        from_user_flow = f'{from_user}用户给{to_user}转账{money}元'
        to_user_flow = f'{to_user}用户收到{from_user}转账{money}元'
        # 记录流水
        from_user_dic['flow'].append(from_user_flow)
        to_user_dic['flow'].append(to_user_flow)

        db_handler.save(from_user_dic)
        db_handler.save(to_user_dic)
        user_loggor.info(f'{from_user}用户给{to_user}转账{money}元')
        return True,from_user_flow
    else:
        user_loggor.info(f'{from_user}用户余额不足')
        return False,'余额不足'

# 银行支付接口
def pay_interface(user,cost):
    user_dic=db_handler.select(user)

    if user_dic['balance'] >= cost:
        user_dic['balance'] -= cost
        user_dic['flow'].append(f'{user}用户支付{cost}成功')
        db_handler.save(user_dic)
        user_loggor.info(f'{user}用户支付{cost}成功')
        return True
    else:
        user_loggor.info(f'{user}用户支付{cost}失败')
        return False

interface/shop_interface

from db import db_handler
from interface import bank_interface
from lib import common

user_logger=common.get_logger('shop')

# 查看购物车
def check_shop_cart_interface(user):
    user_dic = db_handler.select(user)
    user_logger.info(f'{user}查看了购物车')
    return user_dic['shop_cart']

def buy_interface(user,cost):
    flag=bank_interface.pay_interface(user,cost)
    if flag:
        user_dic = db_handler.select(user)
        user_dic['shop_cart'] = {}  # 清空购物车
        db_handler.save(user_dic)
        user_logger.info(f'{user}购买成功')
        return True,'购物成功'
    else:
        user_logger.info(f'{user}余额不足，购物失败')
        return False,'余额不足，购物失败'

def add_shop_cart_interface(user,shop_cart):
    user_dic = db_handler.select(user)
    user_dic['shop_cart'] = shop_cart
    db_handler.save(user_dic)
    user_logger.info(f'{user}添加购物车成功')
    return True,'添加购物车成功'

def clear_shop_cart_interface(user):
    user_dic = db_handler.select(user)
    user_dic['shop_cart'] = {}
    db_handler.save(user_dic)
    user_logger.info(f'{user}购物车清空成功')
    return True,'购物车清空成功'

interface/user_interface

from db import db_handler
from lib import common

user_logger=common.get_logger('user')
# 参看用户接口
def check_user_interface(user):
    user_dic=db_handler.select(user)
    if user_dic:
        return True

# 注册接口
def register_interface(user,pwd,balance = 15000):
    pwd = common.get_md5(pwd)
    user_dic={
        'user':user,
        'pwd':pwd,
        'balance':balance,
        'flow':[],
        'shop_cart':{},
        'lock':False
    }
    db_handler.save(user_dic)

    user_logger.info(f'{user_dic["user"]}用户注册成功!')

    return f'{user}用户注册成功！'

def login_interface(user,pwd):
    user_dic = db_handler.select(user)
    pwd = common.get_md5(pwd)

    if user_dic['lock']:
        user_logger.info(f'{user}用户已被锁定，请联系管理员')
        return False,'用户已被锁定，请联系管理员'

    if user_dic['pwd'] == pwd:
        user_logger.info(f'{user}用户登路成功!')
        return True,f'{user}用户登路成功!'
    user_logger.info(f'{user}输入密码错误!')
    return False,f'{user}密码错误!'


def check_bal_interface(user):
    user_dic=db_handler.select(user)
    user_logger.info(f'{user}参看余额!')
    return user_dic["balance"]

# 注销
def logout_interface():
    from core import src
    user = src.user_online['user']
    src.user_online['user']=None
    user_logger.info(f'{user}注销!')
    return True,f'{user}用户注销成功'

lib/common

import hashlib
import logging.config
from conf import settings

def get_md5(pwd):
    md5_obj=hashlib.md5()
    md5_obj.update(pwd.encode('utf8'))
    sal='LDC专用'
    md5_obj.update(sal.encode('utf8'))
    res = md5_obj.hexdigest()
    return res

# 登陆认证功能
def login_auth(func):
    from core import src
    def inner(*args,**kwargs):
        if src.user_online['user']:
            res = func(*args,**kwargs)
            return res
        else:
            print('请先登录')
            src.login()
    return inner

def get_logger(type_name):
    logging.config.dictConfig(settings.LOGGING_DIC)
    logger = logging.getLogger(type_name)
    return logger

log文件夹内自动生成的文件

[2019-11-22 19:15:15,294][MainThread:19088][task_id:user][user_interface.py:37][INFO][ldc用户登陆成功!]
[2019-11-22 19:16:02,424][MainThread:19088][task_id:bank][bank_interface.py:53][INFO][ldc用户给zxc转账120元]
[2019-11-22 19:16:12,150][MainThread:19088][task_id:bank][bank_interface.py:34][INFO][[ldc]用户参看流水]
[2019-11-22 19:16:19,305][MainThread:19088][task_id:user][user_interface.py:45][INFO][ldc参看余额!]
[2019-11-22 19:16:19,307][MainThread:19088][task_id:shop][shop_interface.py:10][INFO][ldc查看了购物车]
[2019-11-22 19:17:02,286][MainThread:19088][task_id:bank][bank_interface.py:67][INFO][ldc用户支付400成功]
[2019-11-22 19:17:02,290][MainThread:19088][task_id:shop][shop_interface.py:19][INFO][ldc购买成功]
[2019-11-22 19:17:20,777][MainThread:19088][task_id:user][user_interface.py:45][INFO][ldc参看余额!]
[2019-11-22 19:17:20,778][MainThread:19088][task_id:shop][shop_interface.py:10][INFO][ldc查看了购物车]
[2019-11-22 19:19:32,075][MainThread:19088][task_id:bank][bank_interface.py:67][INFO][ldc用户支付0成功]
[2019-11-22 19:19:32,079][MainThread:19088][task_id:shop][shop_interface.py:19][INFO][ldc购买成功]
[2019-11-22 19:19:57,101][MainThread:19088][task_id:admin][admin_interface.py:24][INFO][修改用户ldc额度成功]
[2019-11-22 23:31:16,539][MainThread:2176][task_id:user][user_interface.py:24][INFO][qwe用户注册成功!]
[2019-11-22 23:31:26,546][MainThread:2176][task_id:user][user_interface.py:37][INFO][zxc用户登路成功!]
[2019-11-22 23:31:39,420][MainThread:2176][task_id:bank][bank_interface.py:53][INFO][zxc用户给qwe转账100元]
[2019-11-22 23:31:53,696][MainThread:2176][task_id:bank][bank_interface.py:34][INFO][[zxc]用户参看流水]
[2019-11-22 23:32:39,981][MainThread:2176][task_id:user][user_interface.py:45][INFO][zxc参看余额!]
[2019-11-22 23:32:39,985][MainThread:2176][task_id:shop][shop_interface.py:10][INFO][zxc查看了购物车]
[2019-11-22 23:33:01,157][MainThread:2176][task_id:bank][bank_interface.py:67][INFO][zxc用户支付1500成功]
[2019-11-22 23:33:01,160][MainThread:2176][task_id:shop][shop_interface.py:19][INFO][zxc购买成功]
[2019-11-22 23:33:16,300][MainThread:2176][task_id:user][user_interface.py:53][INFO][zxc注销!]

start.py 启动文件

注意：此处添加环境变量可以省略因为start在项目路径下。当start.py在bin目录下，必须加如环境变量，否则无法引用项目其他文件夹中的模块

import os
import sys
from core import src

BASE_PATH = os.path.dirname(__file__)
sys.path.append(BASE_PATH)

if __name__ == '__main__':
    src.run()