1、使用BeautifulSoup错误
The code that caused this warning is on line 8 of the file *.py. To get rid of this warning, pass the additional argument ‘features="lxml"‘ to the BeautifulSoup constructor.
soup = BeautifulSoup(r.text)
主要是缺少参数，虽然不会出错，但是报红总是感觉不舒服。修改如下：
soup = BeautifulSoup(r.text, "html.parser")
原文：https://www.cnblogs.com/xjf125/p/12541888.html