pip安装失败---由于目标计算机积极拒绝，无法连接

Looking in indexes: http://mirrors.aliyun.com/pypi/simple/
WARNING: 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 0x000002F166B38408>: Failed to establish a new connection: [WinError 10061] 由于目标计算机积极拒绝，无法连接。’))’: http://mirrors.aliyun.com/pypi/simple/xlsxwriter/

解决办法：

1. win+r
2. 输入regedit
3. 打开HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings
4. 找到 ProxyEnable ，修改值为0

这其实也和笔记本有关系，我试过把宽带拔了再插上问题就好了，但是过一会问题还有，目前还不清楚终极解决办法，这样每次都改很难受。。。。