python - urllib爬虫下载图片，很简单的程序，但是输出结果却不定，很奇怪

Question

1.此程序需要第三方模块 bs4 ，请先确保该模块已安装再实验。2.爬虫网站为【http://tieba.baidu.com/p/2772...】，里面的楼主发了130张手机壁纸3.问题参见代码里的注释 {代码...}

怪我咯 · Answer

I measured it three times and it was 131 130
The output may be random (one time 121 120, another time 131 130), or it was 121 120 several times before, and then it became 131 130
I wonder if it’s because new pictures have been added

Questions I answered: Python-QA

Php8, I'm coming too