如果您仍然遇到此问题，以下是为我解决的方法:

If you are still having this issue, here is what solved it for me:

pip install --upgrade setuptools

我试过安装六个(在我的例子中，它还没有安装)，但因为它似乎在寻找 _vendor.six 而不仅仅是 six代码>，这并没有解决它.不知何故，升级 setuptools 解决了这个问题.

I've tried installing six (in my case, it wasn't already installed), but since it seems that it is looking for _vendor.six and not just six, that didn't solve it. Somehow, upgrading setuptools solves it.