python第一阶段小项目作业练习

购物车程序：

salary = int(input('请输入与您的工资：'))
goods = [['手机',2099],['电脑',6999],['配件',99],['衣服',399],['用品',69]]
shopping_cart = []
run_flag = True
while run_flag:
    print('----------商品列表----------')
    info ='''   %s   %s     %d'''
    for index,p in enumerate(goods):
        print(info %(index,p[0],p[1]))
    print('---------退出请选：q---------')
    choose=input('请选择您要购买的商品编号：')
    if choose.isdigit():
        choose = int(choose)
        if choose >= 0 and choose <= len(goods):
            if salary > goods[choose][1]:
                while True:
                    print('您购买的商品如下：','''%s %s''' %(goods[choose][0],goods[choose][1]))
                    judge = input('确定购买以上商品？y or n')
                    if judge == 'y':
                        salary = salary - int(goods[choose][1])
                        shopping_cart.append(goods[choose])
                        print('余额还剩',salary)
                        break
                    elif judge == 'n':
                        break
                    else:
                        print('请输入当有选项！')
                        continue
            else:
                print('您的余额不足！')
                continue
        else:
            print('请选择当前拥有的商品编号！')
            continue
    elif choose == 'q':
        if len(shopping_cart) > 0:
            print('----------您的订单----------')
            for index,p in enumerate(shopping_cart):
                print('''   %d   %s     %d''' %(index,p[0],p[1]))
            print('余额：',salary)
            print('--------------end--------------')
            break
    else:
        print('您的输入有误，请重新输入！')
        continue

退出整个程序==>>:   exit('bye!')

menu = {
    'A':{
        'AA':{
            'AAA': {
                'a1aa':{'aaa'},
                'aa1a':{'aaa'},
                'aaa1':{'aaa'}
            },
            'AAB': {'a1ab':{'aab'},'aa1b':{'aaa'},'aab1':{'aaa'}},
            'AAC': {'a1ac':{'aac'},'aa1c':{'aaa'},'aac1':{'aaa'}}
        },
        'AB':{
            'ABA': {'a2ba':['aba'],'ab2a':['aba'],'aba':['aba']},
            'ABB': {'a2bb':['abb'],'ab2b':['aba'],'abb':['abb']},
            'ABC': {'a2bc':['abc'],'ab2c':['aba'],'abc':['aba']}
        },
        'AC':{
            'ACA': {'a3ca':['aca'],'ac3a':['aca'],'aca':['aca']},
            'ACB': {'a3cb':['acb'],'ac3b':['aca'],'acb':['aca']},
            'ACC': {'a3cc':['acc'],'ac3c':['aca'],'acc':['aca']}
        }
    },
    'B':{
        'BA':{
            'BAA': {'bca2': ['aca'], 'b8ca': ['aca'], 'bca': ['aca']},
            'BAB': {'bcb2': ['acb'], 'b8cb': ['aca'], 'bcb': ['aca']},
            'BAC': {'bcc2': ['acc'], 'b8cc': ['aca'], 'bcc': ['aca']}
        },
        'BB':{
            'BBA': {'bca2': ['aca'], 'a8ca': ['aca'], 'aca': ['aca']},
            'BBB': {'bcb2': ['acb'], 'a8cb': ['aca'], 'acb': ['aca']},
            'BBC': {'bcc2': ['acc'], 'a8cc': ['aca'], 'acc': ['aca']}
        },
        'BC':{
            'BCA2': {'b6ca': ['aca'], 'b8ca': ['aca'], 'bca': ['bca']},
            'BCB2': {'b6cb': ['acb'], 'b8cb': ['aca'], 'bcb': ['aca']},
            'BCC2': {'b6cc': ['acc'], 'b8cc': ['aca'], 'bcc': ['aca']}
        }
    },
    'C':{
        'CA':{
            'CAA': {'bca3': ['aca'], 'b5ca': ['aca'], 'bca': ['aca']},
            'CAB': {'bcb3': ['acb'], 'b5cb': ['aca'], 'bcb': ['aca']},
            'CAC': {'bcc3': ['acc'], 'b5cc': ['aca'], 'bcc': ['aca']}
        },
        'CB':{
            'CBA': {'bca3': ['aca'], 'b5ca': ['aca'], 'bca': ['aca']},
            'CBB': {'bcb3': ['acb'], 'b5cb': ['aca'], 'bcb': ['aca']},
            'CBC': {'bcc3': ['acc'], 'b5cc': ['aca'], 'bcc': ['aca']}
        },
        'CC':{
            'CCA': {'bca3': ['aca'], 'b5ca': ['aca'], 'bca': ['aca']},
            'CCB': {'bcb3': ['acb'], 'b5cb': ['aca'], 'bcb': ['aca']},
            'CCC': {'bcc3': ['acc'], 'b5cc': ['aca'], 'bcc': ['aca']}
        }
    }
}
current_layer = menu
layer = []
while True:
    for k in current_layer:
        print(k)
    choice = input('>>:').strip()
    if not choice: continue
    elif choice in current_layer:
        layer.append(current_layer)
        current_layer = current_layer[choice]
    elif choice == 'b':
        if len(layer) != 0:
            current_layer = layer.pop(-1)
        else:
            print('已到最顶层！')
    elif choice == 'q':
        exit('bye!')
    else:
        print('请正确输入！')