Issue Printing Tables in Jupyter Notebook

asked 2019-04-03 18:35:30 +0100

TristanWL
41 ●2 ●2 ●7

I've been trying to display some tables in sage, in particular I would like to display tables that contain matrices as nice output in a jupyter notebook.

I seem to not be able to get table to work at all. In particular, if I open a new notebook and run the chunk

%display latex
blah = [('A', 'B', 'C'), (0, 1, 2), (3, 4, 5), (6, 7, 8)]
table(blah)

It returns

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

which appears to be some sort of hash value? I can't find anything on this to help debug.

For reference, I'm still running sage 8.4. The environments on the system I'm working on are a little messed up, so I could update to the newest version if there is reason to believe that's the issue, but I would rather not if I can avoid it.

Comments

Are you running a Python 3 version of Sage? That is the only way I have been able to reproduce this problem. Note that the Python 3 version is still somewhat experimental.

John Palmieri ( 2019-04-14 00:47:24 +0100 )edit

Sorry for the late reply, I had to finish my undergraduate thesis.

This was indeed on the python3 version of sage and switching to python2 fixed it. I did not realize the machine I was running on had built sage with python3 and I apologize for not mentioning that detail. It didn't occur to me to check until you pointed it out.

TristanWL ( 2019-04-27 22:46:46 +0100 )edit

Fixed in SageMath 8.8.beta5. In particular, works fine in SageMath 8.8.

slelievre ( 2019-06-30 14:45:17 +0100 )edit

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answered 2019-04-06 12:58:35 +0100

slelievre
17684 ●22 ●160 ●349 http://carva.org/samue...

updated 2019-06-01 17:01:45 +0100

Thanks for reporting! I confirm the same behaviour with SageMath 8.7. Fixing this is now tracked at

Sage Trac ticket 27656: Fix table display in Jupyter

As a workaround, some alternative solutions are offered as answers to

Stack Overflow question 35160256: How do I output lists as a table in Jupyter notebook

To make the import statements work, install the corresponding extra packages:

sage --pip install pandas
sage --pip install tabletext
sage --pip install tabulate

Edit (2019-06-01). Sage Trac ticket 27656 (Fix table display in Jupyter) was merged in SageMath 8.8.beta5. As a result, printing tables in Jupyter should work fine in SageMath 8.8.beta5 and above.

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Comments

Ah, thanks for the reference. Does this mean that the issue is entirely on the ipython side of things? These seem to be alternative methods for printing tables, but don't explain why I'm getting some hash value when I try to use the builtin table command.

That being said, I'm not really attached to the table command other than the convenience, so I'll dive into this thread and see if I can get something else to work.

TristanWL ( 2019-04-07 19:12:19 +0100 )edit

That said, table has a long and distinguished history in Sage, so that should definitely be fixed in Jupyter.

kcrisman ( 2019-04-09 19:42:45 +0100 )edit

@kcrisman - There is now a Sage Trac ticket for this problem, I edited my answer to make it clearer this is indeed a bug, and the "solutions" I first gave can be thought of as a workaround until this is fixed.

slelievre ( 2019-04-13 13:27:43 +0100 )edit

The "some hash value" is simply the base-64 encoding of the table. I know images are passed to the notebook in base64 encoding, and for some reason it's (incorrectly?) doing that with the table as well. You can see that by running import base64; print(base64.b64decode("""PGRpdiBjbG..."""))

Iguananaut ( 2019-04-15 15:24:51 +0100 )edit

@slelievre thanks! In fact I think it has been closed :)

kcrisman ( 2019-05-08 22:14:07 +0100 )edit

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