Django报错Could not find a version that satisfies the requirement pytz (from Django)(from versions: )

安装很多次了，第一次遇到这个报错，记录一下：

报错：Could not find a version that satisfies the requirement pytz (from Django) (from versions: )

No matching distribution found for pytz (from Django)

查看虚拟环境，发现Django没有安装上。

解决方案：

1.指定个旧版本版本：pip install Django==3.0.1 -i https://pypi.tuna./simple --trusted-host pypi.tuna.

参考文档：/xiaobendan_1989/article/details/90647827