在爬虫中，有些网站可能为了防止爬虫，会记录每个IP的访问次数，那么我们就需要访问一次换一个IP。我们可以用爬虫爬IP。声明：仅学习交流，切勿用作商业用途等(In reptiles, some websites might be able to keep track of the number of visits per IP in order to prevent crawlers, so we need to visit and change a IP. We can climb IP with crawlers. Disclaimer: only learning exchanges, not for commercial purposes, etc.)