Re: [O] org-mode and python pandas

[Dov Grobgeld]

Thanks for the answers, but there is still something missing in order
to get it to work. Part of it seems to be connected to the python
parsing. E.g. the following translation of Eric's sh example doesn't
output correctly with python:


#+BEGIN_SRC python :results output
print """,A,B,C
0,0.628365,0.424279,0.619791
1,0.799666,0.527572,0.132928
2,0.837255,0.138906,0.408233
3,0.388080,0.146212,0.575346
"""
#+END_SRC

#+RESULTS:
: ,A,B,C
: 0,0.628365,0.424279,0.619791
: 1,0.799666,0.527572,0.132928
: 2,0.837255,0.138906,0.408233
: 3,0.388080,0.146212,0.575346


#+BEGIN_SRC python :results table
return """,A,B,C
0,0.628365,0.424279,0.619791
1,0.799666,0.527572,0.132928
2,0.837255,0.138906,0.408233
3,0.388080,0.146212,0.575346
"""
#+END_SRC

#+RESULTS:
| 
,A,B,C\n\n0,0.628365,0.424279,0.619791\n\n1,0.799666,0.527572,0.132928\n\n2,0.837255,0.138906,0.408233\n\n3,0.388080,0.146212,0.575346
|

It seems that the only way to get a table from python is by outputting
a two dimensional python structure:

#+BEGIN_SRC python
return [[0,0.628365,0.424279,0.619791],
        [1,0.799666,0.527572,0.132928]]
#+END_SRC

#+RESULTS:
| 0 | 0.628365 | 0.424279 | 0.619791 |
| 1 | 0.799666 | 0.527572 | 0.132928 |

This seems quite limiting....

Another related question is if there is any support for header tables?
I.e. instead of this:

|   |        A |        B |        C |
| 0 | 0.827817 | 0.664009 | 0.089161 |
| 1 | 0.170031 | 0.729214 | 0.110918 |
| 2 | 0.575918 | 0.863924 | 0.757536 |
| 3 | 0.682722 | 0.774445 | 0.992041 |

I want this:

|   |        A |        B |        C |
|---+----------+----------+----------|
| 0 | 0.827817 | 0.664009 | 0.089161 |
| 1 | 0.170031 | 0.729214 | 0.110918 |
| 2 | 0.575918 | 0.863924 | 0.757536 |
| 3 | 0.682722 | 0.774445 | 0.992041 |

I guess that if I start playing around with the python ob module, it
should be possible to get this working?

Regards,
Dov

On Mon, Jul 1, 2013 at 8:04 PM, Rasmus <address@hidden> wrote:
> Achim Gratz <address@hidden> writes:
>
>>>> 2. Add to pandas the option of globally influencing the text
>>>> formatting so that it outputs something more parsable by org-mode.
>>>
>>> This sounds promising, if pandas support csv output that will be
>>> correctly parsed by Org-mode.
>>
>> The package already has CSV export, so one could use that.  I don't know
>> if you could echo the result directly to the output, all examples
>> revolve around putting the CSV into a file.  For Org, TSV output would
>> be more natural.
>
> Something like:
>
> from pandas import DataFrame
> from numpy.random import rand
> from sys import stdout
> df = DataFrame(rand(10,3), columns = list('abc'))
> df
> df.to_csv(stdout, sep="\t", header = True, cols=(1,2))
>
> I was completely unable to get ob-python working this morning, so I
> haven't tested it.  I'm using python3, build in python mode and elpy.
>
> In any case, the csv route might be better, as Pandas doesn't print
> the table if it's too big (try changing 10 to 1000 above).
>
> --
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