解决pip安装出现超时

直接pip3 install django，出现超时重试

WARNING: Retrying (Retry(total=4, connect=None, read=None, redirect=None, status=None)) after connection broken by 'ConnectTimeoutError(<pip._vendor.urllib3.connection.VerifiedHTTPSConnection object at 0x0000023B12ED0400>, 'Connection to pypi.org timed out. (connect timeout=15)')': /simple/django/

在命令后加上国内镜像源瞬间解决

pip3 install django  -i http://pypi.douban.com/simple --trusted-host pypi.douban.com

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