[IPython-User] Canncial way to do web based ipython shell?

Brian Granger ellisonbg@gmail....
Fri Jan 20 12:38:20 CST 2012


On Thu, Jan 19, 2012 at 11:30 AM, Anthony Oliver <anthony@ingenuitas.com> wrote:
> Brian,
> No this helps a lot.  I want the functionality and have looked at a lot of
> other apps but we have been using ipython before the notebook implementation
> and feel it's way better than anything else out there.  I spent some more
> time yesterday poking around the code.  I think I can pull out what I don't
> want from it.  In reality I basically want all the same functionality as the
> notebook, I'm even fine with keeping a history, etc.  Basically I think I
> just need to tell it to use the same kernel every time instead of firing up
> another instance.  Does this sound correct? Or would the better way be to
> start a new kernel instance and kill any old ones saved?

The current implementation of the notebook already has this.  When you
open a give notebook, it will start a kernel.  If you close that
notebook and open it later, the same exact kernel will still be
running and will be used.  Kernels run as long as the notebook server
is run.  Is this what you are after?  If not could you better describe
what you mean.  Do you want one kernel for *all* notebook?  One per

> I guess the TL;DR is I want a singleton instance of a notebook. ;-)
> The way it sounds it isn't possible with the way it's designed.  We are
> currently using cherrypy, not sure what it would take to port over to this,
> but we can use tornado if that is a big staple as well.
> p.s. Thanks to the ipython team for all your work, anytime I jump on a
> system without ipython now it makes me a sad panda.

Great, glad you are enjoying it!



> ---------------------------------
> Anthony Oliver
> Chief Technology Officer
> http://www.ingenuitas.com
> (906) 289-8169
> anthony@ingenuitas.com
> ---------------------------------
> On Wed, Jan 18, 2012 at 1:19 PM, Brian Granger <ellisonbg@gmail.com> wrote:
>> On Tue, Jan 17, 2012 at 1:45 PM, Anthony Oliver <anthony@ingenuitas.com>
>> wrote:
>> > Is there a correct way to just build the shell that could work within a
>> > browser, or an example somewhere?
>> You would need to build a custom web application from the ground up.
>> The best example is the current notebook code.  It shows how to use
>> ZeroMQ to communicate with IPython kernels using JSON messages.  But
>> the code is not really designed to be used as a library.  We plan on
>> moving in that direction, but it will take time.
>> > I basically want the functionality of the notebook.  My problem with
>> > using
>> > notebooks is that we are currently using ipython as an embedded shell
>> > which
>> > is awesome. But we want to extend it through a web interface, the
>> > notebook
>> > method is perfectly fine, except in our application, the current running
>> > program is always in context, so you can think of it as only ever
>> > needing
>> > one notebook.
>> >
>> > I started diving into the notebook app itself, it appears much of the
>> > javascript is also looking for things (for instance I tried to override
>> > the
>> > handlers for the paths so the same thing is always served).  I can
>> > continue
>> > on my path, but I would imagine there maybe a more stripped down example
>> > floating around some where.
>> Unfortunately we don't have any other examples.  On one hand, the
>> notebook app is a fairly simple example itself.  It shows the basics
>> of how you would communicate with kernels and display output, etc.  On
>> the other hand, notebook web application is extremely complex.  There
>> are multiple channels of communication (WebSockets, Ajax), everything
>> is async and you have to wade through our JSON based message protocol.
>>  Not sure if this helps, but I think your approach of diving into the
>> notebook code base is a good one.
>> Cheers,
>> Brian
>> > Thanks.
>> >
>> > ---------------------------------
>> > Anthony Oliver
>> > Chief Technology Officer
>> > http://www.ingenuitas.com
>> > (906) 289-8169
>> > anthony@ingenuitas.com
>> > ---------------------------------
>> >
>> >
>> > _______________________________________________
>> > IPython-User mailing list
>> > IPython-User@scipy.org
>> > http://mail.scipy.org/mailman/listinfo/ipython-user
>> >
>> --
>> Brian E. Granger
>> Cal Poly State University, San Luis Obispo
>> bgranger@calpoly.edu and ellisonbg@gmail.com

Brian E. Granger
Cal Poly State University, San Luis Obispo
bgranger@calpoly.edu and ellisonbg@gmail.com

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