RequestsDependencyWarning: urllib3 (1.26.2) or chardet (3.0.4) doesn‘t match a supported version!

原因：用requests爬虫时出现这个警告，这是因为操作系统安装的请求模块不同，以及本地安装的python依赖关系不同。

解决方案：升级requests包

pip install requests

Reference:

https://stackoverflow.com/questions/56155627/requestsdependencywarning-urllib3-1-25-2-or-chardet-3-0-4-doesnt-match-a-s/56170469

https://stackoverflow.com/questions/50202238/python-pip-requestsdependencywarning-urllib3-1-9-1-or-chardet-2-3-0-doe