当我试图在Microsoft Windows [Version 10.0.17763.344] (c) 2018 Microsoft Corporation.上的命令提示符中安装virtualenv时,这将显示出来。 Collecting virtualenv
Using cached https://files.pythonhosted.org/packages/05/f1/2e07e8ca50e047b9cc9ad56cf4291f4e041fa73207d000a095fe478abf84/v