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本篇文章来自腾讯云 作者：孤独的明月
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步骤：
product_list=<span>[
(</span><span>"</span><span>Mac电脑</span><span>"</span>,9500<span>),
(</span><span>"</span><span>windows电脑</span><span>"</span>,800<span>),
(</span><span>"</span><span>法拉利</span><span>"</span>,8800000<span>),
(</span><span>"</span><span>python入门教程</span><span>"</span>,100<span>),
(</span><span>"</span><span>华为</span><span>"</span>,6000<span>),
]
saving</span>=input(<span>"</span><span>please input your money:</span><span>"</span><span>)
shopping_car</span>=<span>[]
</span><span>if</span><span> saving.isdigit():
saving</span>=<span>int(saving)
</span><span>while</span><span> True:
</span><span>#</span><span>打印商品内容</span>
<span>for</span> i,v <span>in</span> enumerate(product_list,1<span>):
</span><span>print</span>(i,<span>"</span><span>>>>></span><span>"</span><span>,v)
</span><span>#</span><span>引导用户选择商品</span>
choice=input(<span>"</span><span>选择购买商品编号[退出：q]：</span><span>"</span><span>)
</span><span>#</span><span>验证输入是否合法</span>
<span>if</span><span> choice.isdigit():
choice</span>=<span>int(choice)
</span><span>if</span> choice>0 <span>and</span> choice<=<span>len(product_list):
</span><span>#</span><span>将用户选择商品通过choice取出来</span>
p_item=product_list[choice-1<span>]
</span><span>#</span><span>如果钱够，用本金saving减去该商品价格，并将该商品加入购物车</span>
<span>if</span> p_item[1]<<span>saving:
saving</span>-=p_item[1<span>]
shopping_car.append(p_item)
</span><span>else</span><span>:
</span><span>print</span>(<span>"</span><span>余额不足，还剩%s</span><span>"</span>%<span>saving)
</span><span>print</span><span>(p_item)
</span><span>else</span><span>:
</span><span>print</span>(<span>"</span><span>编码不存在</span><span>"</span><span>)
</span><span>elif</span> choice==<span>"</span><span>q</span><span>"</span><span>:
</span><span>print</span>(<span>"</span><span>------------您已经购买如下商品----------------</span><span>"</span><span>)
</span><span>#</span><span>循环遍历购物车里的商品，购物车存放的是已买商品</span>
<span>for</span> i <span>in</span><span> shopping_car:
</span><span>print</span><span>(i)
</span><span>print</span>(<span>"</span><span>您还剩%s元钱</span><span>"</span>%<span>saving)
</span><span>break</span>
<span>else</span><span>:
</span><span>print</span>(<span>"</span><span>invalid input</span><span>"</span>)
www#gaodaima.com来源gaodai#ma#com搞*代#码网搞代码
运行输出结果：
please input your money:10000000 1 >>>> (<span>"</span><span>Mac电脑</span><span>"</span>, 9500<span>) </span>2 >>>> (<span>"</span><span>windows电脑</span><span>"</span>, 800<span>) </span>3 >>>> (<span>"</span><span>法拉利</span><span>"</span>, 8800000<span>) </span>4 >>>> (<span>"</span><span>python入门教程</span><span>"</span>, 100<span>) </span>5 >>>> (<span>"</span><span>华为</span><span>"</span>, 6000<span>) 选择购买商品编号[退出：q]：</span>1<span> (</span><span>"</span><span>Mac电脑</span><span>"</span>, 9500<span>) </span>1 >>>> (<span>"</span><span>Mac电脑</span><span>"</span>, 9500<span>) </span>2 >>>> (<span>"</span><span>windows电脑</span><span>"</span>, 800<span>) </span>3 >>>> (<span>"</span><span>法拉利</span><span>"</span>, 8800000<span>) </span>4 >>>> (<span>"</span><span>python入门教程</span><span>"</span>, 100<span>) </span>5 >>>> (<span>"</span><span>华为</span><span>"</span>, 6000<span>) 选择购买商品编号[退出：q]：</span>1<span> (</span><span>"</span><span>Mac电脑</span><span>"</span>, 9500<span>) </span>1 >>>> (<span>"</span><span>Mac电脑</span><span>"</span>, 9500<span>) </span>2 >>>> (<span>"</span><span>windows电脑</span><span>"</span>, 800<span>) </span>3 >>>> (<span>"</span><span>法拉利</span><span>"</span>, 8800000<span>) </span>4 >>>> (<span>"</span><span>python入门教程</span><span>"</span>, 100<span>) </span>5 >>>> (<span>"</span><span>华为</span><span>"</span>, 6000<span>) 选择购买商品编号[退出：q]：</span>1<span> (</span><span>"</span><span>Mac电脑</span><span>"</span>, 9500<span>) </span>1 >>>> (<span>"</span><span>Mac电脑</span><span>"</span>, 9500<span>) </span>2 >>>> (<span>"</span><span>windows电脑</span><span>"</span>, 800<span>) </span>3 >>>> (<span>"</span><span>法拉利</span><span>"</span>, 8800000<span>) </span>4 >>>> (<span>"</span><span>python入门教程</span><span>"</span>, 100<span>) </span>5 >>>> (<span>"</span><span>华为</span><span>"</span>, 6000<span>) 选择购买商品编号[退出：q]：</span>2<span> (</span><span>"</span><span>windows电脑</span><span>"</span>, 800<span>) </span>1 >>>> (<span>"</span><span>Mac电脑</span><span>"</span>, 9500<span>) </span>2 >>>> (<span>"</span><span>windows电脑</span><span>"</span>, 800<span>) </span>3 >>>> (<span>"</span><span>法拉利</span><span>"</span>, 8800000<span>) </span>4 >>>> (<span>"</span><span>python入门教程</span><span>"</span>, 100<span>) </span>5 >>>> (<span>"</span><span>华为</span><span>"</span>, 6000<span>) 选择购买商品编号[退出：q]：</span>3<span> (</span><span>"</span><span>法拉利</span><span>"</span>, 8800000<span>) </span>1 >>>> (<span>"</span><span>Mac电脑</span><span>"</span>, 9500<span>) </span>2 >>>> (<span>"</span><span>windows电脑</span><span>"</span>, 800<span>) </span>3 >>>> (<span>"</span><span>法拉利</span><span>"</span>, 8800000<span>) </span>4 >>>> (<span>"</span><span>python入门教程</span><span>"</span>, 100<span>) </span>5 >>>> (<span>"</span><span>华为</span><span>"</span>, 6000<span>) 选择购买商品编号[退出：q]：</span>3<span> 余额不足，还剩1170700 (</span><span>"</span><span>法拉利</span><span>"</span>, 8800000<span>) </span>1 >>>> (<span>"</span><span>Mac电脑</span><span>"</span>, 9500<span>) </span>2 >>>> (<span>"</span><span>windows电脑</span><span>"</span>, 800<span>) </span>3 >>>> (<span>"</span><span>法拉利</span><span>"</span>, 8800000<span>) </span>4 >>>> (<span>"</span><span>python入门教程</span><span>"</span>, 100<span>) </span>5 >>>> (<span>"</span><span>华为</span><span>"</span>, 6000<span>) 选择购买商品编号[退出：q]：</span>1<span> (</span><span>"</span><span>Mac电脑</span><span>"</span>, 9500<span>) </span>1 >>>> (<span>"</span><span>Mac电脑</span><span>"</span>, 9500<span>) </span>2 >>>> (<span>"</span><span>windows电脑</span><span>"</span>, 800<span>) </span>3 >>>> (<span>"</span><span>法拉利</span><span>"</span>, 8800000<span>) </span>4 >>>> (<span>"</span><span>python入门教程</span><span>"</span>, 100<span>) </span>5 >>>> (<span>"</span><span>华为</span><span>"</span>, 6000<span>) 选择购买商品编号[退出：q]：</span>4<span> (</span><span>"</span><span>python入门教程</span><span>"</span>, 100<span>) </span>1 >>>> (<span>"</span><span>Mac电脑</span><span>"</span>, 9500<span>) </span>2 >>>> (<span>"</span><span>windows电脑</span><span>"</span>, 800<span>) </span>3 >>>> (<span>"</span><span>法拉利</span><span>"</span>, 8800000<span>) </span>4 >>>> (<span>"</span><span>python入门教程</span><span>"</span>, 100<span>) </span>5 >>>> (<span>"</span><span>华为</span><span>"</span>, 6000<span>) 选择购买商品编号[退出：q]：</span>5<span> (</span><span>"</span><span>华为</span><span>"</span>, 6000<span>) </span>1 >>>> (<span>"</span><span>Mac电脑</span><span>"</span>, 9500<span>) </span>2 >>>> (<span>"</span><span>windows电脑</span><span>"</span>, 800<span>) </span>3 >>>> (<span>"</span><span>法拉利</span><span>"</span>, 8800000<span>) </span>4 >>>> (<span>"</span><span>python入门教程</span><span>"</span>, 100<span>) </span>5 >>>> (<span>"</span><span>华为</span><span>"</span>, 6000<span>) 选择购买商品编号[退出：q]：</span>6<span> 编码不存在 </span>1 >>>> (<span>"</span><span>Mac电脑</span><span>"</span>, 9500<span>) </span>2 >>>> (<span>"</span><span>windows电脑</span><span>"</span>, 800<span>) </span>3 >>>> (<span>"</span><span>法拉利</span><span>"</span>, 8800000<span>) </span>4 >>>> (<span>"</span><span>python入门教程</span><span>"</span>, 100<span>) </span>5 >>>> (<span>"</span><span>华为</span><span>"</span>, 6000<span>) 选择购买商品编号[退出：q]：</span>7<span> 编码不存在 </span>1 >>>> (<span>"</span><span>Mac电脑</span><span>"</span>, 9500<span>) </span>2 >>>> (<span>"</span><span>windows电脑</span><span>"</span>, 800<span>) </span>3 >>>> (<span>"</span><span>法拉利</span><span>"</span>, 8800000<span>) </span>4 >>>> (<span>"</span><span>python入门教程</span><span>"</span>, 100<span>) </span>5 >>>> (<span>"</span><span>华为</span><span>"</span>, 6000<span>) 选择购买商品编号[退出：q]：</span>1<span> (</span><span>"</span><span>Mac电脑</span><span>"</span>, 9500<span>) </span>1 >>>> (<span>"</span><span>Mac电脑</span><span>"</span>, 9500<span>) </span>2 >>>> (<span>"</span><span>windows电脑</span><span>"</span>, 800<span>) </span>3 >>>> (<span>"</span><span>法拉利</span><span>"</span>, 8800000<span>) </span>4 >>>> (<span>"</span><span>python入门教程</span><span>"</span>, 100<span>) </span>5 >>>> (<span>"</span><span>华为</span><span>"</span>, 6000<span>) 选择购买商品编号[退出：q]：</span>1*4<span> invalid input </span>1 >>>> (<span>"</span><span>Mac电脑</span><span>"</span>, 9500<span>) </span>2 >>>> (<span>"</span><span>windows电脑</span><span>"</span>, 800<span>) </span>3 >>>> (<span>"</span><span>法拉利</span><span>"</span>, 8800000<span>) </span>4 >>>> (<span>"</span><span>python入门教程</span><span>"</span>, 100<span>) </span>5 >>>> (<span>"</span><span>华为</span><span>"</span>, 6000<span>) 选择购买商品编号[退出：q]：</span>3<span> 余额不足，还剩1145600 (</span><span>"</span><span>法拉利</span><span>"</span>, 8800000<span>) </span>1 >>>> (<span>"</span><span>Mac电脑</span><span>"</span>, 9500<span>) </span>2 >>>> (<span>"</span><span>windows电脑</span><span>"</span>, 800<span>) </span>3 >>>> (<span>"</span><span>法拉利</span><span>"</span>, 8800000<span>) </span>4 >>>> (<span>"</span><span>python入门教程</span><span>"</span>, 100<span>) </span>5 >>>> (<span>"</span><span>华为</span><span>"</span>, 6000<span>) 选择购买商品编号[退出：q]：q </span>------------您已经购买如下商品----------------<span> (</span><span>"</span><span>Mac电脑</span><span>"</span>, 9500<span>) (</span><span>"</span><span>Mac电脑</span><span>"</span>, 9500<span>) (</span><span>"</span><span>Mac电脑</span><span>"</span>, 9500<span>) (</span><span>"</span><span>windows电脑</span><span>"</span>, 800<span>) (</span><span>"</span><span>法拉利</span><span>"</span>, 8800000<span>) (</span><span>"</span><span>Mac电脑</span><span>"</span>, 9500<span>) (</span><span>"</span><span>python入门教程</span><span>"</span>, 100<span>) (</span><span>"</span><span>华为</span><span>"</span>, 6000<span>) (</span><span>"</span><span>Mac电脑</span><span>"</span>, 9500<span>) 您还剩1145600元钱 Process finished with exit code 0</span>
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转载请注明原文链接：python编程-利用python编程写一个购物小程序
转载请注明原文链接：python编程-利用python编程写一个购物小程序
