# [IPython-User] IPython notebook produces no output on Windows 7

Tue Jul 10 09:10:32 CDT 2012

Hi Matthias,

thank you for your interest. I am still trying to debug the problem and
have not been successful so far. Below I tried to follow your
instructions and got a little further.

On 10.07.2012 10:29, Matthias BUSSONNIER wrote:
> Hi alexander,
>
>
> You should get smith like :
> [NotebookApp] Kernel started: af66e841-321b-4201-81e3-4bb40bb1b6f4
> [NotebookApp] Connecting to: tcp://127.0.0.1:57081
> [NotebookApp] Connecting to: tcp://127.0.0.1:57082
> [NotebookApp] Connecting to: tcp://127.0.0.1:57084
>
> when clicking on a notebook.

I clicked on a notebook after starting ipython and looked at the console
output:

C:\Temp>ipython notebook
[NotebookApp] Using existing profile dir:
u'C:\\Users\\user\\.ipython\\profile_default'
[NotebookApp] Serving notebooks from C:\Temp
[NotebookApp] The IPython Notebook is running at: http://127.0.0.1:8888/
[NotebookApp] Use Control-C to stop this server and shut down all kernels.
[NotebookApp] Using MathJax from CDN:
http://cdn.mathjax.org/mathjax/latest/MathJax.js
[NotebookApp] Kernel started: f7d147cb-898a-4d1d-a5a8-7a5edcee4be6
[IPKernelApp] To connect another client to this kernel, use:
[IPKernelApp] --existing kernel-f7d147cb-898a-4d1d-a5a8-7a5edcee4be6.json
[NotebookApp] Connecting to: tcp://127.0.0.1:50760

So, it seems something is started. Additionally after executing a line
in the notebook the number in the prompt changes

In [3]: print("test")
<press CTRL+ENTER>
In [4]: print("test")

but I do not get any output or other changes. The console does not show
any error messages either.

>
> this make me think that ws connexion never occurred.
> Do you have a proxy ?
I do not have a proxy configured in neither Chrome nor Firefox.

>
> You can try  %qtconsole in the notebook to get a console attached to the same kernel… but I doubt the command ever get to the kernel.
Oh, that was a good tip. I tried executing %qtconsole in the notebook
and a console window appeared! I also tried to define a variable a=5
in the notebook and I could access that variable in the other opened
console windows. So some connection seems to exist but the notebook
still does not show any output.

Anything else that I can try to get it to work?

Thanks for the feedback!
Alexander