Just to spell out the obvious: By the principle of least surprise the
working directory should always be the same if possible.
On Wednesday, October 28, 2015 at 1:28:15 AM UTC+1, Andrey Novoseltsev
wrote:
>
> I have ran
>
> import subprocess
> print subprocess.check_output("pwd")
> print r.eval("system('pwd')")
> print subprocess.check_output("pwd")
>
> in SageNB, SageMathCell, and SageMathCloud. The result always is: the
> middle one gives a different directory for R than the other two for Sage
> (OK, in the cloud I had to put the worksheet in a subfolder to make them
> different). Why is that the case? What if I want to use files between
> different systems? (Like I want to save "plot.png" in R.) Looking at the
> code for R interface, it does not seem to be specific to R, although I
> didn't try other interfaces. Shouldn't the working directory be the same
> for all interfaces including "the main one", at least when I didn't try to
> change it explicitly?
>
> SageNB uses different tmp directory for each cell execution. There is
> probably no point in adjusting to it in Sage. But the cell server uses a
> specific tmp directory for the whole session (in case of interacts/linked
> cells) and the cloud sensibly uses the directory of the worksheet as the
> starting one. Interfaces should be started there as well and I think it
> should be taken care of by Sage, not interfaces.
>
> Thank you,
> Andrey
>
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