On Tue, Jan 14, 2014 at 11:32 AM, Nick Dokos <ndokos@gmail.com> wrote:

> Ken Mankoff <mankoff@gmail.com> writes:
>
> > On Tue, 14 Jan 2014, Ken Mankoff wrote:
> >>
> >> I've seen various historical issues with :session but it seems I may
> have a
> >> different problem. This is the latest org in emacs 24.3. If I do not
> have
> >> :session, then everything works just fine.
> >>
> >> If I C-c C-c in the following code:
> >>
> >> #+BEGIN_SRC python :session transect
> >> import numpy as np
> >> x = np.arange(12)
> >> #+END_SRC
> >>
> >> Emacs hangs the first time with minibuffer message of "Sent
> >> python-eldoc-setup-code". If I C-g, I can edit the org buffer again. All
> >> other invocations of that code and the minibuffer message is "executing
> >> Python code block...", but still emacs hangs until I C-g.
> >>
> >
> >
> > Hmm. If I run IPython instead of regular python by setting this:
> > (setq org-babel-python-command "ipython --pylab --pdb --nosep")
> >
> > Then org does not hang. It returns as expected. However, the
> > capturing of output doesn't seem to work right.
> >
> > In Org, the following:
> >
> > #+begin_src python :session foo
> > x = 42
> > print x
> > #+end_src
> >
> > Produces no RESULTS, and in the Python *foo* buffer I see:
> >
> > In [8]: x = 42
> > In [9]: print x
> > 42
> > In [10]:
> open('/var/folders/60/jb7kfrsn2jd90hpcgj4m_wrc0000gn/T/babel-35562TZV/python-3$
> > In [11]: 'org_babel_python_eoe'
> > Out[11]: 'org_babel_python_eoe'
> >
> >
> > But if I remove the "print" statment in Org:
> >
> > #+begin_src python :session foo
> > x = 42
> > x
> > #+end_src
> >
> > Then the RESULTS shows me 42, and the Python *foo* buffer is:
> >
> > In [12]: x = 42
> > In [13]: x
> > Out[13]: 42
> > In [14]:
> open('/var/folders/60/jb7kfrsn2jd90hpcgj4m_wrc0000gn/T/babel-35562TZV/python-3$
> > In [15]: 'org_babel_python_eoe'
> > In [15]: Out[15]: 'org_babel_python_eoe'
>
> I believe that's the expected behaviour: the defaults value of :results
> for python (and most other) source blocks is "value" and the print
> statement has no
> value. If you want the output to appear in the results, try :results
> output.
>

Nope. If I don't use IPython, everything hangs regardless of :results.
When I do use IPython, ":results output" doesn't show "print" statement.
The plain "x" showing up in the output goes away if I use ":results output".

   -k.