首先创建了一个虚拟环境然后再Settings下安装第三方库pip
之后搜索Django
点击安装，报错
Could not find a version that satisfies the requirement pytz (from Django）
改变思路，用命令行
还是报错 You are using pip version 20.1; however, version 20.1.1 is available.
You should consider upgrading via the ‘D:\virtualEnvs\venetest1\Scripts\python.exe -m pip
install --upgrade pip’ command.
输入 python -m pip install -U --force-reinstall pip
升级pip
之后输入 pip install Django==3.0.3
可以安装成功了！