今天安裝一下requests模塊，遇到網絡問題
pip install requests
Retrying (Retry(total=4, connect=None, read=None, redirect=None)) after connection broken by 'ProxyError('Cannot connect to proxy.', NewConnectionError('<pip._vendor.requests.packages.urllib3.connection.VerifiedHTTPSConnection object at 0x00000000044CF7B8>: Failed to establish a new connection: [Errno 10061] ',))': /simple/requests/ Retrying (Retry(total=3, connect=None, read=None, redirect=None)) after connection broken by 'ProxyError('Cannot connect to proxy.', NewConnectionError('<pip._vendor.requests.packages.urllib3.connection.VerifiedHTTPSConnection object at 0x00000000044CF6A0>: Failed to establish a new connection: [Errno 10061] ',))': /simple/requests/ Retrying (Retry(total=2, connect=None, read=None, redirect=None)) after connection broken by 'ProxyError('Cannot connect to proxy.', NewConnectionError('<pip._vendor.requests.packages.urllib3.connection.VerifiedHTTPSConnection object at 0x00000000044CF5F8>: Failed to establish a new connection: [Errno 10061] ',))': /simple/requests/ Retrying (Retry(total=1, connect=None, read=None, redirect=None)) after connection broken by 'ProxyError('Cannot connect to proxy.', NewConnectionError('<pip._vendor.requests.packages.urllib3.connection.VerifiedHTTPSConnection object at 0x00000000044CF4A8>: Failed to establish a new connection: [Errno 10061] ',))': /simple/requests/ Retrying (Retry(total=0, connect=None, read=None, redirect=None)) after connection broken by 'ProxyError('Cannot connect to proxy.', NewConnectionError('<pip._vendor.requests.packages.urllib3.connection.VerifiedHTTPSConnection object at 0x00000000044CF358>: Failed to establish a new connection: [Errno 10061] ',))': /simple/requests/ Could not find a version that satisfies the requirement requests (from versions: ) No matching distribution found for requests
剛開始懷疑官方源不行，但是指定 阿里的源 並且給 trust-hosts 參數仍然不行，最后懷疑可能是代理造成的影響
可是查了任務管理器，並沒有什么代理軟件，然后覺得應該是之前代理軟件起了系統代理的作用，盡管沒運行，但是配置影響了整個系統
所以重新打開代理軟件，把全局模式關閉了，然后就成功了