From mboxrd@z Thu Jan  1 00:00:00 1970
From: "Charles C. Berry" <ccberry@ucsd.edu>
Subject: Re: Bug: org-export-babel-evaluate causes everything to be exported
 [8.3.4 (release_8.3.4-824-ga02fe8)]
Date: Fri, 20 May 2016 10:29:07 -0700
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To: Ken Mankoff <mankoff@gmail.com>
Cc: emacs-org <emacs-orgmode@gnu.org>

On Fri, 20 May 2016, Ken Mankoff wrote:

>
> On 2016-05-20 at 07:12, Ken Mankoff <mankoff@gmail.com> wrote:
>> On 2016-05-19 at 23:33, Charles C. Berry <ccberry@ucsd.edu> wrote:
>>> On Thu, 19 May 2016, Ken Mankoff wrote:
>>
>> (setq org-export-babel-evaluate t)
>>
>> #+BEGIN_SRC octave :exports results :cache nil
>> "hello, world"
>> #+END_SRC
>> #+RESULTS:
>> : hello, world
>>
>> Yes, the above appears to work.

Really? I do not see the hash in your results block.

>
> But it doesn't work with sessions. Can you advise what settings to have how I can have the following code in an Org document:
>
> #+BEGIN_SRC python :results output :exports results :session foo :cache nil
> print("hello, world")
> #+END_SRC
> #+RESULTS:
> : hello, world
>
> And easily export that document without evaluating the code?

`:cache yes'

Of course, you must eval at least once with `:cache yes' to set the hash.

Chuck

p.s. I like to use stuff like

: import time
: print(time.strftime("%H:%M:%S"))

in src blocks to do :cache experiments