start.py文件

from core.src import run
if __name__ == '__main__':
    run()

conf目录下settings.p

import os
BASE_DIR = os.path.dirname(os.path.dirname(__file__))
LOG_PATH= r'%s\logs\access.log' % BASE_DIR
USER_DATA_PATH=os.path.join(BASE_DIR,'db','user_data')

core目录下src.py

import os
import json
import time

user_data = {
    'username': None,
    'is_login': False
}

from conf import settings

from lib import common

def register():
    print('注册'.center(50, '*'))
    if user_data['is_login']:
        print('已经登录')
        return
    while True:
        username = input('请输入用户名').strip()
        path = settings.BASE_DIR
        path_file = os.path.join(path, 'db', '%s.json' % username)
        if os.path.exists(path_file):
            print('用户已存在,请重新输入')
            continue
        password = input('请输入密码').strip()
        user_dic = {'username': username, 'password': password, 'balance': 15000, 'locked': False, 'flow': [],
                    'shopping_cart': {}}
        with open(path_file, 'w', encoding='utf-8')as f:
            json.dump(user_dic, f)
            print('注册成功')
            break

from conf import settings

def login():
    print('登录'.center(50, '*'))
    count = 0
    if user_data['is_login']:
        print('已经登录')
        return
    while True:
        username = input('请输入用户名：>>').strip()
        path = settings.BASE_DIR
        path_file = os.path.join(path, 'db', '%s.json' % username)
        if not os.path.exists(path_file):
            print('用户不存在,请重新输入')
            continue
        with open(path_file, 'r', encoding='utf-8')as f:
            data = json.load(f)
        if data.get('locked'):
            print('用户账号已经锁定，请联系管理员')
            break
        password = input('请输入密码').strip()

        if password == data.get('password'):
            print('登录成功')
            user_data['username'] = username
            user_data['is_login'] = True
            break
        else:
            print('密码错误')
            count += 1
            if count == 3:
                data['locked'] = True
            with open(path_file, 'w', encoding='utf-8')as f:
                json.dump(data, f)

@common.outter
def transfer():
    print('转账'.center(50, '*'))
    while True:
        to_user = input('请输入转账的账户用户名:>>').strip()
        path = settings.BASE_DIR
        to_path_file = os.path.join(path, 'db', '%s.json' % to_user)
        if not os.path.exists(to_path_file):
            print('用户不存在')
            continue
        transfer_money = int(input('请输入转账金额:>>').strip())
        from_path_file = os.path.join(path, 'db', '%s.json' % user_data['username'])

        with open(from_path_file, 'r', encoding='utf-8')as f:
            from_user_dic = json.load(f)

        if from_user_dic['balance'] >= transfer_money:
            with open(to_path_file, 'r', encoding='utf-8') as f1:
                to_user_dic = json.load(f1)
            to_user_dic['balance'] += transfer_money
            to_user_dic['flow'].append('收到了%s的一笔转账%s元' %(from_user_dic['username'], transfer_money))
            with open(to_path_file, 'w', encoding='utf-8') as f2:
                json.dump(to_user_dic, f2, ensure_ascii=False)

            from_user_dic['balance'] -= transfer_money
            from_user_dic['flow'].append('向%s转了一笔钱%s元' % (to_user_dic['username'], transfer_money))

            with open(from_path_file, 'w', encoding='utf-8') as f3:
                json.dump(from_user_dic, f3, ensure_ascii=False)
            print("转账成功")
            break

        else:
            print("没钱")

@common.outter
def withdraw():
    print('提现'.center(50, '*'))
    while True:
        money = input('请输入提现金额:>>').strip()
        if not money: continue
        if not money.isdigit():
            print('输入金额不是数字')
            continue
        money = int(money)
        path = settings.BASE_DIR
        path_file = os.path.join(path, 'db', '%s.json' % user_data['username'])

        with open(path_file, 'r', encoding='utf-8')as f:
            user_dic = json.load(f)

        now = time.strftime('%Y-%m-%d %X')

        if user_dic['balance'] >= money * 1.05:
            user_dic['balance'] -= money * 1.05
            user_dic['flow'].append('%s在%s提现了%s元' % (user_data['username'], now, money))
            with open(path_file, 'w', encoding='utf-8')as f:
                json.dump(user_dic, f, ensure_ascii=False)
                print('恭喜提现成功')
                break
        else:
            print('提现失败，请检查金额')
            continue

@common.outter
def check_balance():
    print('查看余额'.center(50, '*'))
    while True:
        money = input('请输入需要查询用户的用户名:>>').strip()
        path = settings.BASE_DIR
        path_file = os.path.join(path, 'db', '%s.json' % money)
        if not os.path.exists(path_file):
            print('用户不存在')
            continue
        path = settings.BASE_DIR
        path_file = os.path.join(path, 'db', '%s.json' % user_data['username'])
        with open(path_file, 'r', encoding='utf-8')as f:
            user_dic = json.load(f)
            user_dic['flow'].append('%s查询余额' % user_data['username'])
            print(user_dic['balance'])
            break

@common.outter
def pay():
    print('充值'.center(50, '*'))
    while True:
        money = input('请输入充值金额')
        if not money.isdigit():
            print('输入金额不是数字')
            continue
        money = int(money)
        path = settings.BASE_DIR
        path_file = os.path.join(path, 'db', '%s.json' % user_data['username'])
        if not os.path.exists(path_file):
            print('用户不存在,请重新输入')
            continue
        with open(path_file, 'r', encoding='utf-8')as f:
            user_dic = json.load(f)

        now = time.strftime('%Y-%m-%d %X')

        user_dic['balance'] += money
        user_dic['flow'].append('%s在%s充值了%s元' % (user_data['username'], now, money))
        with open(path_file, 'w', encoding='utf-8')as f:
            json.dump(user_dic, f, ensure_ascii=False)
            print('充值成功')
            break

@common.outter
def check_flow():
    print('查看流水'.center(50, '*'))
    while True:
        money = input('请输入需要查询用户的用户名:>>').strip()
        path = settings.BASE_DIR
        path_file = os.path.join(path, 'db', '%s.json' % money)
        if not os.path.exists(path_file):
            print('用户不存在')
            continue
        path = settings.BASE_DIR
        path_file = os.path.join(path, 'db', '%s.json' % user_data['username'])
        with open(path_file, 'r', encoding='utf-8')as f:
            user_dic = json.load(f)
            print(user_dic['flow'])
            break

@common.outter
def add_cart():
    print('加入购物车'.center(50, '*'))
    shopping_cart = {}
    while True:
        goods = [
            ['xxa', 100],
            ['xbb', 200],
            ['xxc', 300]
        ]

        for k, v in enumerate(goods):
            print('%s %s %s' % (k, v[0], v[1]))
        num = input('请输入序号：>>(q to quit)')
        if num.isdigit():
            num = int(num)
            goods_name = goods[num][0]
            goods_price = goods[num][1]
            if goods_name not in shopping_cart:
                shopping_cart[goods_name] = {'price': goods_price, 'count': 1}
            else:
                shopping_cart[goods_name]['count'] += 1
            print('请继续购物')
        elif num == 'q':
            if shopping_cart:
                path = settings.BASE_DIR
                path_file = os.path.join(path, 'db', '%s.json' % user_data['username'])
                with open(path_file, 'r', encoding='utf-8')as f:
                    user_dic = json.load(f)
                user_dic['shopping_cart'] = shopping_cart
                with open(path_file, 'w', encoding='utf-8')as f:
                    json.dump(user_dic, f, ensure_ascii=False)
                print('欢迎下次再来')
                break

        else:
            print('输入非法数字，请重新输入')

@common.outter
def check_shop_car():
    print('查看购物车'.center(50, '*'))
    while True:
        money = input('请输入需要查询用户的用户名:>>').strip()
        path = settings.BASE_DIR
        path_file = os.path.join(path, 'db', '%s.json' % money)
        if not os.path.exists(path_file):
            print('用户不存在')
            continue
        path = settings.BASE_DIR
        path_file = os.path.join(path, 'db', '%s.json' % user_data['username'])
        with open(path_file, 'r', encoding='utf-8')as f:
            user_dic = json.load(f)
            print(user_dic['shopping_cart'])
            break

func_dic = {
    '0': ['注册', register],
    '1': ['登录', login],
    '2': ['转账', transfer],
    '3': ['提现', withdraw],
    '4': ['查看余额', check_balance],
    '5': ['充值', pay],
    '6': ['查看流水', check_flow],
    '7': ['加入购物车', add_cart],
    '8': ['查看购物车', check_shop_car]
}

def run():
    while True:
        for k in func_dic:
            print(k, func_dic[k][0])
        choice = input('请输入对应指令:>>').strip()
        if choice not in func_dic:
            print('输入错误指令，请重新输入')
            continue
        else:
            print(func_dic[choice][1]())

lib目录下common.py

from core import src

def outter(func):
    def wrapper(*args,**kwargs):
        if src.user_data['is_login']:
            res= func(*args,**kwargs)
            return res
        else:
            src.login()
    return wrapper