解决symbol not found in flat namespace ‘_PyDescr_IsData

救了老命了。

安装lxml总报错误：

symbol not found in flat namespace ‘_PyDescr_IsData

搜索了N多网站都找不到解决办法。最后在这个不知名网站找到了：

https://pullanswer.com/questions/symbol-not-found-in-flat-namespace-_pydescr_isdata

原因就1个：

If anybody is getting error after installed (while running) symbol not found in flat namespace (_PyDescr_IsData), it is because virtual env’s python version is different from system’s python version

按照这个办法，删除了Python官网下载安装的Python，重新用homebrew的Python新建了一个venv，然后就搞定了！