解决pip install报错:Cannot connect to proxy问题
pip install *** :Cannot connect to proxy在使用pip install 安装任何新的包都会出现下面错误：
PS C:\WINDOWS\system32> pip install djangoLooking in indexes: http://pypi.douban.com/simpleCollecting django Retrying (Retry(total=4, connect=None, read=None, redirect=None, status=None)) after connection broken by 'ProxyError('Cannot connect to proxy.', NewConnectionError('<pip._vendor.urllib3.connection.HTTPConnection object at 0x000002574165FF60>: Failed to establish a new connection: 由于目标计算机积极拒绝，无法连接。',))': http://pypi.douban.com/simple/django/ Retrying (Retry(total=3, connect=None, read=None, redirect=None, status=None)) after connection broken by 'ProxyError('Cannot connect to proxy.', NewConnectionError('<pip._vendor.urllib3.connection.HTTPConnection object at 0x000002574165F128>: Failed to establish a new connection: 由于目标计算机积极拒绝，无法连接。',))': http://pypi.douban.com/simple/django/ Retrying (Retry(total=2, connect=None, read=None, redirect=None, status=None)) after connection broken by 'ProxyError('Cannot connect to proxy.', NewConnectionError('<pip._vendor.urllib3.connection.HTTPConnection object at 0x0000025741663208>: Failed to establish a new connection: 由于目标计算机积极拒绝，无法连接。',))': http://pypi.douban.com/simple/django/ Retrying (Retry(total=1, connect=None, read=None, redirect=None, status=None)) after connection broken by 'ProxyError('Cannot connect to proxy.', NewConnectionError('<pip._vendor.urllib3.connection.HTTPConnection object at 0x0000025741663358>: Failed to establish a new connection: 由于目标计算机积极拒绝，无法连接。',))': http://pypi.douban.com/simple/django/ Retrying (Retry(total=0, connect=None, read=None, redirect=None, status=None)) after connection broken by 'ProxyError('Cannot connect to proxy.', NewConnectionError('<pip._vendor.urllib3.connection.HTTPConnection object at 0x00000257416630F0>: Failed to establish a new connection: 由于目标计算机积极拒绝，无法连接。',))': http://pypi.douban.com/simple/django/ Could not find a version that satisfies the requirement django (from versions: )No matching distribution found for django出现这样的问题的原因是代理出现了问题，安装了蓝灯出现的。只要关闭蓝灯， pip install 就会提示上面的bug。
解决办法
按Win+R快捷键，输入regedit，打开注册表编辑器找到HKEY_CURRENT_USER/Software/Microsoft/Windows/CurrentVersion/Internet Settings分支，把它下面以 Proxy 打头的键值对（如ProxyEnable，ProxyOverride，ProxyServer等）全部删除。
这样再次 pip install 就可以了。
python requests proxies 错误
ProxyError: HTTPSConnectionPool(host='www.zhihu.com', port=443): Max retries exceeded with url: / (Caused by ProxyError('Cannot connect to proxy.', NewConnectionError('<requests.packages.urllib3.connection.VerifiedHTTPSConnection object at 0x03CEFB50>: Failed to establish a new connection: ',)))
SSLError: unknown protocol (_ssl.c:590)
ConnectionError: ('Connection aborted.', BadStatusLine("''",))如果是初次使用代理，以上三种错误出现的原因基本是1.端口错误2.代理类型不正确。
明确的一点是访问https站点,要用https类型的代理。http同理。
如图
西刺代理分的比较明确
第一次用的时候就是因为这个浪费我半天时间。。
总结
以上为个人经验，希望能给大家一个参考，也希望大家多多支持脚本之家。
来源:https://www.jb51.net/article/284083.htm
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