[IPython-dev] Loop over a set of notebook cells?

[Kiko]

2014-03-17 19:44 GMT+01:00 MinRK <benjaminrk at gmail.com>:

> You can execute a cell range with a little javascript (e.g. in a
> %%javascript cell):
>
> var start = 2;
> var stop = 4;
>
> for (var i = start; i < stop; i++) {
>     var cell = IPython.notebook.get_cell(i);
>     cell.execute();
> }
>
>
Maybe this:

    %%javascript
    IPython.notebook.execute_cell_range(x,y)

 with x,y the range of the cells.


>
> On Mon, Mar 17, 2014 at 9:05 AM, Patrick Surry <patrick.surry at gmail.com>wrote:
>
>> Yes, I'd seen that, but it seemed to fall into the external/batch
>> category (write a script that post-processes a notebook) rather than
>> something that you could do interactively within the notebook workflow.
>>
>> Cheers,
>> Patrick
>>
>>
>> From: Clyde Fare <clyde.fare at gmail.com>
>>
>>
>> I think MinRK did something like this here:
>>
>> http://nbviewer.ipython.org/gist/minrk/6011986
>>
>> His NotebookLoader class does loop over the cells.
>>
>> Clyde
>>
>>
>>
>> On 15 March 2014 11:18, Patrick Surry <patrick.surry at gmail.com> wrote:
>>
>> > What about a "loop delimiter" magic where you insert a matching pair of
>> > %magics bracketing a sequence of regular cells, and then it basically
>> > unrolls the loop for you?
>> >
>> > i.e. when you run the magic, on the first loop iteration it executes
>> each
>> > cell in place, with the first loop value, and for each subsequent
>> > iterations, it appends a copied sequence of new cells after the %end,
>> > evaluated with the corresponding loop element.   So if you looped over a
>> > list of two items, you'd end up with a second copy of all your looped
>> cells
>> > that have been executed with the second item in the list. (see example
>> > sketch below)
>> >
>> > So it's doing a kind of repeated block copy & paste (useful in it's own
>> > right), unrolling the loop, and leaving you the new results to explore
>> and
>> > further tweak.  Maybe it would also mark itself as executed somehow
>> > (comment itself out?!) so the notebook is stable if you re-execute all
>> > cells?
>> >
>> > You'd rapidly want multi-cell delete I guess :)  Perhaps other
>> bracketing
>> > magics like %block cut / %endblock / %block paste ??
>> >
>> > Patrick
>> >
>> > Example with cells a, b, c:
>> >
>> >     %begin for item in [1,2]
>> >     ---
>> >     a
>> >     ---
>> >     b
>> >     ---
>> >     c
>> >     ---
>> >     %end
>> >
>> > when executed becomes:
>> >
>> >     # %begin for item in [1, 2]
>> >     ---
>> >     a [item=1]
>> >     ---
>> >     b [item=1]
>> >     ---
>> >     c [item=1]
>> >     ---
>> >     # %end
>> >     ---
>> >     a [item=2]
>> >     ---
>> >     b [item=2]
>> >     ---
>> >     c [item=2]
>> >     ---
>> >
>> >
>> > From: Thomas Kluyver <takowl at gmail.com>
>> >
>> > >On 14 March 2014 09:46, Nikolas Tezak <ntezak at stanford.edu> wrote:
>> >
>> > > I've been thinking about this for a while as well. Although this
>> doesn't
>> > > quite address looping, I think one idea might be to use cell tags to
>> > create
>> > > certain "run sets" of cells and then have a little widget/ui component
>> > that
>> > > allows for selecting and running all cells of a certain tag. So, in
>> that
>> > > respect a good interface for marking/selecting multiple cells and then
>> > > tagging them or running them or copying them would be great.
>> >
>> >
>> > Tags on cells is something that we want to do - there are a lot of
>> useful
>> > things that could be done with it.
>> >
>> > Thomas
>> >
>>
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>>
>
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