On Tue, May 26, 2015 at 4:02 PM, Ken Mankoff <mankoff@gmail.com> wrote:

>
> On 2015-05-26 at 09:26, Dror Atariah <drorata@gmail.com> wrote:
> >> #+BEGIN_SRC python :session with_matplotlib :results file :exports both
> >> import matplotlib
> >> matplotlib.use('Agg')
> >> import matplotlib.pyplot as plt
> >> fig=plt.figure(figsize=(3,2))            # 4
> >> plt.plot([1,3,2])                              # 3
> >> plt.savefig('myfig.png')                  # 2
> >> 'myfig.png'                                     # 1
> >> #+END_SRC
> >>
> >> #+RESULTS:
> >> [[file:myfig.png]]
> >>
> >
> > As I mentioned before, if I evaluate the second block as-is I get the
> > error. However, if I comment out all the lines except #1 then the code
> > returns the correct results block. Then, I started to add the numbered
> > lines. Adding #2 and #3 still doesn't break the behavior. Once adding
> line
> > #4 the behavior breaks. Maybe this observation can be helpful? This
> happens
> > both when starting Emacs -Q or without -Q.
>
>
> Still no solution but a few comments:
>
> 1) What you write here and on SE are not the same. Please cut-and-paste
> because details matter. For example, the SE code has "import
> matplotlib.pyplot" and then "plt.figure" but that code crashes because you
> did not import "as plt" like you do here...
>
I see. Let's focus on the code posted in this thread and assume that the
problem is not related to python mistakes.


>
> 2) It seems to be an echo issue. In my *with_matplotlib* buffer in Emacs,
> I see:
>
> #+BEGIN_EXAMPLE
> Python 2.7.9 |Anaconda 2.2.0 (x86_64)| (default, Dec 15 2014, 10:37:34)
> [GCC 4.2.1 (Apple Inc. build 5577)] on darwin
> Type "help", "copyright", "credits" or "license" for more information.
> Anaconda is brought to you by Continuum Analytics.
> Please check out: http://continuum.io/thanks and https://binstar.org
> >>> import matplotlib
> >>> matplotlib.use('Agg')
> >>> import matplotlib.pyplot as plt
> fig=plt.figure(figsize=(3,2))
> plt.plot([1,3,2])
>
> plt.savefig('myfig.png')
> 'myfig.png'
>
> open('/var/folders/bl/trcxdptd1_q4k6q5fdhvp2m00000gn/T/babel-52565cmH/python-525659vF',
> 'w').write(str(_))
> 'org_babel_python_eoe'
> >>> [<matplotlib.lines.Line2D object at 0x10454dd10>]
> >>> 'myfig.png'
> >>> 'org_babel_python_eoe'
> >>>
> #+END_EXAMPLE
>
> Where you see everything printed twice. I notice that in addition, you have
>
> > r/folders/kz/1c2cxn1x60n_t5p2j1p02b180000gn/T/py6499_X0''', 'exec'));
>
> at the top of your buffer, and I do not. I think the "exec" might be
> causing everything to echo as it runs, so everything is printed 2x, and
> that confuses Org, and it is not able to capture your filename.
>
This sounds like a promising hint. Where is this first line coming from?
How can I disable this double printing or figure out why is happening?



>
>   -k.
>
>


-- 
Dror Atariah, Ph.D.
de.linkedin.com/in/atariah