自学教程：解决pip

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 django
Looking in indexes: http://pypi.douban.com/simple
Collecting 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: [WinError 10061] 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: [WinError 10061] 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: [WinError 10061] 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: [WinError 10061] 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: [WinError 10061] 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: [Errno 10060] ',)))

SSLError: [SSL: UNKNOWN_PROTOCOL] 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wanshiok.com。