python-31:然而我发现结果并非我想要的

程序运行完成以后，当我兴冲冲的打开文件夹时，却发现虽然程序已经按个人预期正常运行，图片也已经下载好了，可是下载到的图片倒是小图片，这并非我想要的，确定是什么地方出错了

这并非我想要的结果，可是不能说前面的代码彻底是错误的，前面的代码演示了图片下载中一种比较简单的状况。

你们可能会发现一个问题，浏览网页上的图片的时，会有如下几种状况

1. 图片都在一个页面上显示，就像这个网址展现的同样：

   https://mm.taobao.com/687471686.htm?spm=719.7800760.a312r.19.W8893x

       代码有点长，往右拉会看到全部img图片的信息

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ine-height: 1.5;">&nbsp;</span></div><div style="text-align: center;padding-bottom: 0.0px;margin: 0.0px;padding-left: 0.0px;padding-right: 0.0px;padding-top: 0.0px;"><strong style="line-height: 1.5;color: #0000ff;font-size: 24.0px;"><img width="630" height="945" style="margin: 10.0px;width: 630.0px;float: none;height: 945.0px;" src="//img.alicdn.com/imgextra/i2/687471686/TB1wGjBGVXXXXa5aXXXXXXXXXXX_!!687471686-0-tstar.jpg"/></strong></div><div style="text-align: center;padding-bottom: 0.0px;margin: 0.0px;padding-left: 0.0px;padding-right: 0.0px;padding-top: 0.0px;"><strong style="line-height: 1.5;color: #0000ff;font-size: 24.0px;"></strong><img style="float: none;margin: 10.0px;" src="//img.alicdn.com/imgextra/i4/687471686/TB1GDOAFFXXXXc7bpXXXXXXXXXX_!!687471686-0-tstar.jpg_620x10000.jpg"/></div><div style="text-align: center;padding-bottom: 0.0px;margin: 0.0px;padding-left: 0.0px;padding-right: 0.0px;padding-top: 0.0px;">&nbsp;<img class="hoverZoomLink" style="line-height: 1.5;float: none;margin: 10.0px;" src="//img.alicdn.com/imgextra/i1/687471686/TB1DCDxIXXXXXbuXFXXXXXXXXXX_!!687471686-0-tstar.jpg_620x10000.jpg"/></div><div style="text-align: center;padding-bottom: 0.0px;margin: 0.0px;padding-left: 0.0px;padding-right: 0.0px;padding-top: 0.0px;">&nbsp;</div><div style="text-align: center;padding-bottom: 0.0px;margin: 0.0px;padding-left: 0.0px;padding-right: 0.0px;padding-top: 0.0px;">&nbsp;</div><div style="text-align: center;padding-bottom: 0.0px;margin: 0.0px;padding-left: 0.0px;padding-right: 0.0px;padding-top: 0.0px;"><img style="float: none;margin: 10.0px;" class="hoverZoomLink" src="//img.alicdn.com/imgextra/i1/687471686/TB1ET6UIXXXXXbHXXXXXXXXXXXX_!!687471686-0-tstar.jpg_620x10000.jpg"/></div><div style="text-align: center;padding-bottom: 0.0px;margin: 0.0px;padding-left: 0.0px;padding-right: 0.0px;padding-top: 0.0px;"><span style="color: #0000ff;"><span style="font-size: 24.0px;"><strong><span style="color: #ff0000;"><img style="float: none;margin: 10.0px;" class="hoverZoomLink" src="//img.alicdn.com/imgextra/i4/687471686/TB1YRWaHFXXXXXaXFXXXXXXXXXX_!!687471686-0-tstar.jpg_620x10000.jpg"/>&nbsp;</span></strong></span></span></div><div style="text-align: center;padding-bottom: 0.0px;margin: 0.0px;padding-left: 0.0px;padding-right: 0.0px;padding-top: 0.0px;"><img style="float: none;margin: 10.0px;" class="hoverZoomLink" src="//img.alicdn.com/imgextra/i1/687471686/TB1eiChHFXXXXbQXFXXXXXXXXXX_!!687471686-0-tstar.jpg_620x10000.jpg"/></div><div style="text-align: center;padding-bottom: 0.0px;margin: 0.0px;padding-left: 0.0px;padding-right: 0.0px;padding-top: 0.0px;"><img style="float: none;margin: 10.0px;" class="hoverZoomLink" src="//img.alicdn.com/imgextra/i3/687471686/TB1QxyaHFXXXXb5XVXXXXXXXXXX_!!687471686-0-tstar.jpg_620x10000.jpg"/></div><div style="text-align: center;padding-bottom: 0.0px;margin: 0.0px;padding-left: 0.0px;padding-right: 0.0px;padding-top: 0.0px;">&nbsp;</div><div style="text-align: center;padding-bottom: 0.0px;margin: 0.0px;padding-left: 0.0px;padding-right: 0.0px;padding-top: 0.0px;">&nbsp;</div><div style="text-align: center;padding-bottom: 0.0px;margin: 0.0px;padding-left: 0.0px;padding-right: 0.0px;padding-top: 0.0px;">&nbsp;</div><div style="text-align: center;padding-bottom: 0.0px;margin: 0.0px;padding-left: 0.0px;padding-right: 0.0px;padding-top: 0.0px;"><span style="color: #0000ff;"><span style="font-size: 24.0px;"><strong><span style="color: #ff0000;"><img style="float: none;margin: 10.0px;" class="hoverZoomLink" src="//img.alicdn.com/imgextra/i1/687471686/TB1ZO3PHpXXXXaVaXXXXXXXXXXX_!!687471686-0-tstar.jpg_620x10000.jpg"/> </span></strong></span></span></div><div style="text-align: center;padding-bottom: 0.0px;margin: 0.0px;padding-left: 0.0px;padding-right: 0.0px;padding-top: 0.0px;">&nbsp;</div><div style="text-align: center;padding-bottom: 0.0px;margin: 0.0px;padding-left: 0.0px;padding-right: 0.0px;padding-top: 0.0px;"><span style="color: #0000ff;"><span style="font-size: 24.0px;"><strong><span style="color: #ff0000;"><img style="float: none;margin: 10.0px;" class="hoverZoomLink" src="//img.alicdn.com/imgextra/i1/687471686/TB1I6Y_HpXXXXXUXVXXXXXXXXXX_!!687471686-0-tstar.jpg_620x10000.jpg"/> </span></strong></span></span></div><div style="text-align: center;padding-bottom: 0.0px;margin: 0.0px;padding-left: 0.0px;padding-right: 0.0px;padding-top: 0.0px;"><span style="color: #0000ff;"><span style="font-size: 24.0px;"><strong><span style="color: #ff0000;"><img style="float: none;margin: 10.0px;" class="hoverZoomLink" src="//img.alicdn.com/imgextra/i1/687471686/TB1X9b9HpXXXXbaXVXXXXXXXXXX_!!687471686-0-tstar.jpg_620x10000.jpg"/> </span></strong></span></span></div><div style="text-align: center;padding-bottom: 0.0px;margin: 0.0px;padding-left: 0.0px;padding-right: 0.0px;padding-top: 0.0px;"><span style="color: #0000ff;"><span style="font-size: 24.0px;"><strong><span style="color: #ff0000;"><img style="float: none;margin: 10.0px;" class="hoverZoomLink" src="//img.alicdn.com/imgextra/i2/687471686/TB1x_IeHpXXXXa4XXXXXXXXXXXX_!!687471686-0-tstar.jpg_620x10000.jpg"/> </span></strong></span></span></div><div style="text-align: center;padding-bottom: 0.0px;margin: 0.0px;padding-left: 0.0px;padding-right: 0.0px;padding-top: 0.0px;"><span style="color: #0000ff;"><span style="font-size: 24.0px;"><strong><span style="color: #ff0000;"><img style="float: none;margin: 10.0px;" class="hoverZoomLink" src="//img.alicdn.com/imgextra/i2/687471686/TB15IocHpXXXXanXpXXXXXXXXXX_!!687471686-0-tstar.jpg_620x10000.jpg"/></span></strong></span></span></div><div style="text-align: center;padding-bottom: 0.0px;margin: 0.0px;padding-left: 0.0px;padding-right: 0.0px;padding-top: 0.0px;"><div style="padding: 0.0px;margin: 0.0px;"><strong style="line-height: 1.5;color: #0000ff;font-size: 24.0px;">&nbsp;<img class="hoverZoomLink" style="margin: 10.0px;float: none;" src="//img.alicdn.com/imgextra/i2/687471686/TB15YuXHXXXXXaoaXXXXXXXXXXX_!!687471686-0-tstar.jpg_620x10000.jpg"/>&nbsp;</strong><span style="color: #0000ff;"><span style="font-size: 24.0px;"><strong>&nbsp;</strong></span></span></div><div style="padding: 0.0px;margin: 0.0px;"><strong style="line-height: 1.5;color: #0000ff;font-size: 24.0px;"><img class="hoverZoomLink" style="margin: 10.0px;float: none;" src="//img.alicdn.com/imgextra/i2/687471686/TB1MOydHXXXXXaVXVXXXXXXXXXX_!!687471686-0-tstar.jpg_620x10000.jpg"/></strong></div><div style="padding: 0.0px;margin: 0.0px;"><strong style="line-height: 1.5;color: #0000ff;font-size: 24.0px;"><img class="hoverZoomLink" style="margin: 10.0px;float: none;" src="//img.alicdn.com/imgextra/i1/687471686/TB14zukHXXXXXcKXXXXXXXXXXXX_!!687471686-0-tstar.jpg_620x10000.jpg"/>&nbsp;</strong><span style="color: #0000ff;"><span style="font-size: 24.0px;"><strong>&nbsp;</strong></span></span></div><div style="padding: 0.0px;margin: 0.0px;"><span style="color: #0000ff;"><span style="font-size: 24.0px;"></span></span><strong style="line-height: 36.0px;color: #0000ff;font-size: 24.0px;"><span style="color: #ff0000;">媛媛有</span><strong style="color: #ff0000;">裤</strong><strong style="color: #ff0000;">爆女王之称</strong></strong></div></div><div style="text-align: center;padding-bottom: 0.0px;margin: 0.0px;padding-left: 0.0px;padding-right: 0.0px;padding-top: 0.0px;"><strong style="line-height: 36.0px;color: #0000ff;font-size: 24.0px;"></strong></div><div style="text-align: center;padding-bottom: 0.0px;margin: 0.0px;padding-left: 0.0px;padding-right: 0.0px;padding-top: 0.0px;"><div><div style="padding-bottom: 0.0px;margin: 0.0px;padding-left: 0.0px;padding-right: 0.0px;padding-top: 0.0px;"><span style="color: #0000ff;"><span style="font-size: 24.0px;"><strong><img style="margin: 10.0px;width: 630.0px;float: none;height: 944.0px;" width="630" height="944" src="//img.alicdn.com/imgextra/i4/687471686/TB1X6iSGVXXXXa4XXXXXXXXXXXX_!!687471686-0-tstar.jpg"/><img style="margin: 10.0px;width: 630.0px;float: none;height: 540.0px;" width="630" height="540" src="//img.alicdn.com/imgextra/i1/687471686/TB1QlbtGVXXXXXRXVXXXXXXXXXX_!!687471686-0-tstar.jpg"/><img style="margin: 10.0px;width: 630.0px;float: none;height: 698.0px;" width="630" height="698" src="//img.alicdn.com/imgextra/i4/687471686/TB1zHzCGVXXXXXoaXXXXXXXXXXX_!!687471686-0-tstar.jpg"/>&nbsp; &nbsp;<img style="margin: 10.0px;width: 630.0px;float: none;height: 947.0px;" width="630" height="947" src="//img.alicdn.com/imgextra/i4/687471686/TB1WtjsGVXXXXbpXVXXXXXXXXXX_!!687471686-0-tstar.jpg"/><img style="margin: 10.0px;width: 630.0px;float: none;height: 649.0px;" width="630" height="649" src="//img.alicdn.com/imgextra/i2/687471686/TB1HanJGVXXXXXfXpXXXXXXXXXX_!!687471686-0-tstar.jpg"/></strong></span></span></div></div></div><div style="text-align: center;padding-bottom: 0.0px;margin: 0.0px;padding-left: 0.0px;padding-right: 0.0px;padding-top: 0.0px;"><strong style="line-height: 1.5;color: #0000ff;font-size: 24.0px;">&nbsp;&nbsp;</strong><span style="color: #0000ff;"><span style="font-size: 24.0px;"><strong>&nbsp;</strong></span></span></div><p style="text-align: center;"><span style="font-size: 24.0px;"><span style="font-family: simhei;"><span style="color: #ff0000;"></span></span></span></p><p style="text-align: center;"><span style="line-height: 36.0px;font-family: simhei;color: #ff0000;font-size: 24.0px;">2012澳赞最美网货淘女郎冠军，衷心感谢你们的支持!:)</span></p><p><span style="font-size: 24.0px;"><span style="font-family: simhei;"><span style="color: #ff0000;"></span></span></span><span style="display: none;">&nbsp;</span><span style="display: none;">&nbsp;</span><span style="display: none;">&nbsp;</span><span style="display: none;">&nbsp;</span>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp;<img style="margin: 10.0px;width: 630.0px;float: none;height: 420.0px;" width="630" height="420" src="//img.alicdn.com/imgextra/i1/687471686/T1sdAmFtXbXXXXXXXX_!!687471686-0-tstar.jpg"/>&nbsp;<strong style="text-align: center;font-size: 36.0px;"><span style="color: #ff0000;">&nbsp;</span></strong></p><p style="text-align: center;">&nbsp;<span style="color: #ff0000;"><span style="font-size: 24.0px;"><strong>时尚卫衣</strong></span></span></p><p style="text-align: center;">&nbsp;</p><p style="text-align: center;"><img style="margin: 10.0px;float: none;" class="hoverZoomLink" src="//img.alicdn.com/imgextra/i4/687471686/TB1bz4mFFXXXXciapXXXXXXXXXX_!!687471686-0-tstar.jpg_620x10000.jpg"/></p><p style="text-align: center;"><span style="font-size: 24.0px;"><span style="color: #ff0000;"><strong>西装外套</strong></span></span><span style="line-height: 1.5;">&nbsp;</span></p><p style="text-align: center;"><img style="margin: 10.0px;float: none;" src="//img.alicdn.com/imgextra/i2/687471686/TB1NIYVFFXXXXc_aXXXXXXXXXXX_!!687471686-0-tstar.jpg"/></p><p style="text-align: center;"><img style="margin: 10.0px;float: none;" class="hoverZoomLink" src="//img.alicdn.com/imgextra/i1/687471686/TB1KLtlFFXXXXXFbXXXXXXXXXXX_!!687471686-0-tstar.jpg_620x10000.jpg"/><span style="line-height: 1.5;">&nbsp;</span></p><div style="text-align: center;padding-bottom: 0.0px;margin: 0.0px;padding-left: 0.0px;padding-right: 0.0px;padding-top: 0.0px;"><span style="font-size: 18.0px;"><span><span style="line-height: 27.0px;"></span></span></span><div style="text-align: center;padding-bottom: 0.0px;margin: 0.0px;padding-left: 0.0px;padding-right: 0.0px;padding-top: 0.0px;"><div style="text-align: center;padding-bottom: 0.0px;margin: 0.0px;padding-left: 0.0px;padding-right: 0.0px;font-size: large;padding-top: 0.0px;"><p style="text-align: center;">&nbsp;<span style="font-size: 18.0px;"><span style="font-family: microsoft yahei;"><span style="color: #000000;"><span><strong style="font-style: normal;font-weight: bold;">◆◇◆◇◆◇◆◇◆◇◆◇◆◇◆◇◆◇◆◇◆◇◆◇◆◇◆◆◇◆◇◆◇◆◇◆◇◆◇◆◇◆◇◆◇◆◇◆◇</strong></span></span></span></span></p></div></div></div><div style="text-align: center;"><div style="text-align: center;"><div style="text-align: center;"><span style="line-height: 36.0px;font-size: 24.0px;"><strong><font style="background-color: #ffffff;"><span style="font-family: 宋体;color: black;"><span style="font-family: 宋体;color: black;"><font style="background-color: #ffffff;" color="#3d85c6" face="黑体"><span style="font-family: 宋体;color: black;"><font color="#3d85c6"></font></span></font></span></span></font></strong></span></div><div style="text-align: right;"><div style="text-align: center;"><strong style="font-size: 24.0px;"><span style="color: #0000ff;">我和湖南卫视主持人乐乐姐</span></strong></div></div><p style="text-align: center;"><span style="font-size: 18.0px;"><strong><span style="color: #0000ff;"><img style="margin: 0.0px;float: none;" src="//img.alicdn.com/sns_album/i2/T1bh87XitIXXb1upjX.jpg"/> </span></strong></span></p><p style="text-align: center;"><span style="font-size: 24.0px;"><strong><span style="color: #0000ff;">我和明星温碧霞</span></strong></span></p><p style="text-align: center;"><strong><span style="color: #0000ff;"><span style="font-size: 24.0px;"><img style="margin: 0.0px;float: none;" src="//img.alicdn.com/sns_album/i1/T1fMyiXlJcXXb1upjX.jpg"/> </span></span></strong></p><p style="text-align: center;"><span style="font-size: 24.0px;"><strong><span style="color: #0000ff;">我和明星周海媚</span></strong></span></p><p style="text-align: center;"><img style="margin: 0.0px;float: none;" src="//img.alicdn.com/sns_album/i4/T16fmiXdFiXXb1upjX.jpg"/></p><p style="text-align: center;"><span style="font-size: 24.0px;"><span style="color: #ff0000;"><strong>我和韩寒</strong></span></span></p><p style="text-align: center;"><img style="border-right-width: 0.0px;margin: 0.0px;float: none;border-top-width: 0.0px;border-bottom-width: 0.0px;border-left-width: 0.0px;" src="//img.alicdn.com/sns_album/i4/T1buSiXgFmXXb1upjX.jpg"/></p></div></div><p>&nbsp;</p>
</div>
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       这种状况能够直接使用咱们前面所编写的代码直接一次性将图片下载，而且下载的是你看到的图片

    2. 被封装在CSS样式或者调用JS显示的图片，这种有不少表现形式，好比像百度图片同样，每一版固定加载必定数量的图片，而后你往下拉它又会不断加载，还有就是像咱们极视界相册网页上的同样，上面显示一个大图，下面显示一些小图片

咱们再来看看这个相册的网页源码

<!--strat-->
<div class="effect">
      <div class="effect_top">
         <div class="effect_img" id="effect_img">
            <a class="effect_img_left" href="http://product.yesky.com/gshijie/sheying/35/51594035_14.shtml" target="_self"></a>
         <span><img src="http://image.tianjimedia.com/uploadImages/2015/065/00/53R466408947_1000x500.jpg" alt="移轴镜头纪录梦幻风光大片" /></span>
            <a class="effect_img_right" href="http://product.yesky.com/gshijie/sheying/35/51594035_2.shtml" target="_self"></a>
         </div>
      </div>
      
      <div class="clear"></div>
      <div class="effect_bottom">
                                                                     <div class="effect_syz">
<div><span><a href="http://product.yesky.com/gshijie/sheying/27/51594027.shtml"><img src="http://image.tianjimedia.com/uploadImages/2015/065/33/1ODMD78HA21V_100x75.jpg" alt="极简风光摄影 极简的美" /></a></span></div>
<p><a href="http://product.yesky.com/gshijie/sheying/27/51594027.shtml">&lt;&lt;上一组</a></p>
</div>
                                     <div class="effect_scroll" id="scroll">
            <div class="viewport">
               <div class="overview" style="left: 0px; ">
<ul>
 <li  class="bottom_show"  >
<a href="http://product.yesky.com/gshijie/sheying/35/51594035.shtml"><img src="http://image.tianjimedia.com/uploadImages/2015/065/00/53R466408947_80x60.jpg" alt="移轴镜头纪录梦幻风光大片_风光"/></a>
</li>
 <li >
<a href="http://product.yesky.com/gshijie/sheying/35/51594035_2.shtml"><img src="http://image.tianjimedia.com/uploadImages/2015/065/04/2G35M4E8Z02G_80x60.jpg" alt="移轴镜头纪录梦幻风光大片_风光"/></a>
</li>
 <li >
 ......

通过分析咱们知道，咱们前面是把<li  class="bottom_show"  >代码块里面的图片获取出来了，因此说下载的就是这些80*60 的小图片，那么为了将大图片下载下来，咱们须要再一次对源码进行分析