urllib3.exceptions.MaxRetryError: HTTPConnectionPool(host=‘localhost‘, port=8097): Max retries excee

使用visdom后，出现以下问题：

requests.exceptions.ConnectionError: HTTPConnectionPool(host='localhost', port=8097): Max retries exceeded with url: /env/main (Caused by NewConnectionError(': Failed to establish a new connection: [WinError 10061] 由于目标计算机积极拒绝，无法连接。'))
[WinError 10061] 由于目标计算机积极拒绝，无法连接。
Visdom python client failed to establish socket to get messages from the server. This feature is optional and can be disabled by initializing Visdom with `use_incoming_socket=False`, which will prevent waiting for this request to timeout.
Setting up a new session... 

visdom 没有启动的话，也会出现以上问题：

解决方法：

python -m visdom.server