HTTPConnectionPool for python

When I try

import visdom
import numpy as np
vis = visdom.Visdom()
vis.text('Hello, world!')
vis.image(np.ones((10, 10, 3)))

I got this:

Traceback (most recent call last):
  File "/usr/local/lib/python2.7/dist-packages/visdom/__init__.py", line 170, in _send
    data=msg
  File "/usr/local/lib/python2.7/dist-packages/requests/api.py", line 110, in post
    return request('post', url, data=data, json=json, **kwargs)
  File "/usr/local/lib/python2.7/dist-packages/requests/api.py", line 56, in request
    return session.request(method=method, url=url, **kwargs)
  File "/usr/local/lib/python2.7/dist-packages/requests/sessions.py", line 488, in request
    resp = self.send(prep, **send_kwargs)
  File "/usr/local/lib/python2.7/dist-packages/requests/sessions.py", line 609, in send
    r = adapter.send(request, **kwargs)
  File "/usr/local/lib/python2.7/dist-packages/requests/adapters.py", line 487, in send
    raise ConnectionError(e, request=request)
ConnectionError: HTTPConnectionPool(host='localhost', port=8097): Max retries exceeded with url: /events (Caused by NewConnectionError('<requests.packages.urllib3.connection.HTTPConnection object at 0x7fa5b40f3690>: Failed to establish a new connection: [Errno 111] Connection refused',))

Actually the first time I launched the web successfully. But after that it cannot work anymore even I restart the computer.

[onlytailei]

Sorry… Forget to start the server…

[lvdmaaten]

You should run the python -m visdom.server command from your terminal, not in the python REPL. Make sure the server is running, so start in it a separate terminal window (potentially using screen or tmux)