您需要激活首先是您的虚拟环境.

You need to activate your virtual environment first.

$ source PATH_TO_ENV/bin/env
$ pip install django

在新创建的virtualenv中，还将有一个激活Shell脚本.对于Windows系统，为命令提示符和Powershell提供了激活脚本.

In a newly created virtualenv there will also be a activate shell script. For Windows systems, activation scripts are provided for the Command Prompt and Powershell.

在Posix系统上，它位于/ENV/bin/

On Posix systems, this resides in /ENV/bin/

除非您执行此操作，否则您将使用系统python和系统库.这就是为什么您看到此错误.

Unless you do this you are using system python and system libs. That's why you see the error.

如果需要将lib安装到系统范围中，则需要root访问权限:

If you need to install a lib into the system scope you need root access:

$ sudo pip install django