今天在安裝retrying時報連接超時錯誤，最終需要使用國內(nèi)鏡像進行更新..
pip install retrying
Collecting retrying
Retrying (Retry(total=4, connect=None, read=None, redirect=None, status=None)) after connection broken by 'ProxyError('Cannot connect to proxy.', timeout('timed out',))': /simple/retrying/
Retrying (Retry(total=3, connect=None, read=None, redirect=None, status=None)) after connection broken by 'ProxyError('Cannot connect to proxy.', timeout('timed out',))': /simple/retrying/
Retrying (Retry(total=2, connect=None, read=None, redirect=None, status=None)) after connection broken by 'ProxyError('Cannot connect to proxy.', timeout('timed out',))': /simple/retrying/
Retrying (Retry(total=1, connect=None, read=None, redirect=None, status=None)) after connection broken by 'ProxyError('Cannot connect to proxy.', timeout('timed out',))': /simple/retrying/
Retrying (Retry(total=0, connect=None, read=None, redirect=None, status=None)) after connection broken by 'ProxyError('Cannot connect to proxy.', timeout('timed out',))': /simple/retrying/
Could not find a version that satisfies the requirement retrying (from versions: )
No matching distribution found for retrying
推薦使用douban提供的pipy國內(nèi)鏡像服務(wù)，如果想手動指定源，可以在pip后面跟-i 來指定源，比如用豆瓣的源來安裝retrying框架：
pip install retrying -i http://pypi.douban.com/simple --trusted-host pypi.douban.com
The repository located at pypi.douban.com is not a trusted or secure host and is being ignored. If this repository is available via HTTPS it is recommended to use HTTPS instead, otherwise you may silence this warning and allow it anyways with '--trusted-host pypi.douban.com'.
