解决pip3 install waring ‘The script xxx is installed in ‘/home/xxx/bin‘ which is not on PATH‘

解决办法：

echo 'export PATH=/home/xxx/bin:$PATH' >>~/.bashrc
source ~/.bashrc

其中“/home/xxx/bin”为WARNING提示的PATH
然后卸载掉刚才安装的包，并重新安装：

pip3 uninstall virtualenv

pip3 install virtualenv