報錯信息如下：
WARNING: Retrying (Retry(total=4, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError ('<pip._vendor.urllib3.connection.VerifiedHTTPSConnection object at 0x0000015EC9DBCD68>: Failed to establish a new connection: [Errno 11004] getaddrinfo failed')': /simple/virtualenv/ WARNING: Retrying (Retry(total=3, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError ('<pip._vendor.urllib3.connection.VerifiedHTTPSConnection object at 0x0000015EC9DBC630>: Failed to establish a new connection: [Errno 11004] getaddrinfo failed')': /simple/virtualenv/ WARNING: Retrying (Retry(total=2, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError ('<pip._vendor.urllib3.connection.VerifiedHTTPSConnection object at 0x0000015EC9DBC6D8>: Failed to establish a new connection: [Errno 11004] getaddrinfo failed')': /simple/virtualenv/ WARNING: Retrying (Retry(total=1, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError ('<pip._vendor.urllib3.connection.VerifiedHTTPSConnection object at 0x0000015EC9DBC668>: Failed to establish a new connection: [Errno 11004] getaddrinfo failed')': /simple/virtualenv/ WARNING: Retrying (Retry(total=0, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError ('<pip._vendor.urllib3.connection.VerifiedHTTPSConnection object at 0x0000015EC9DBC0B8>: Failed to establish a new connection: [Errno 11004] getaddrinfo failed')': /simple/virtualenv/ ERROR: Could not find a version that satisfies the requirement virtualenv (from versions: none) ERROR: No matching distribution found for virtualenv
【解決】
1.
通過鏡像安裝django 如：pip install django==1.9.8 -i https://pypi.tuna.tsinghua.edu.cn/simple
2.
通過鏡像安裝virtualenv 如：pip install virtualenv -i http://pypi.douban.com/simple/ --trusted-host pypi.douban.com
3.
所以推薦使用virtualenvwrapper：通過鏡像安裝 如：pip install virtualenvwrapper-win -i http://pypi.douban.com/simple/ --trusted-host pypi.douban.com
4.
創建完成后，使用mkvirtualenv testvir2 自動進入虛擬環境 通過workon 來查看當前有哪些虛擬環境；進入虛擬環境 workon +虛擬環境