Hi,
why not use tempfile standard package with specifying a prefix, so that
you both have insurance that the file is not existing and unpredictable,
andi correct lexicographic order :
import tempfile
for i in range(10):
file_path = tempfile.mkstemp(prefix='tmp{}'.format(i), dir='/tmp')[1]
with open(file_path, 'w') as f:
f.write('hop')
Ciao,
Thierry
On Tue, Jul 01, 2014 at 10:06:18AM -0700, Niles Johnson wrote:
>
>
>
> On Tuesday, July 1, 2014 12:45:57 PM UTC-4, Nils Bruin wrote:
> >
> >
> > It probably was intended. As a general rule, temporary files live in
> > directories where multiple entities have file creation privileges,
> > including ones that don't necessarily trust each other fully. If you're
> > creating filenames via a predictable pattern, you're vulnerable to a denial
> > of service, since an adversary might try and predict which file you're
> > going to try and create next and do that before you.
> >
>
> This is my understanding too
>
>
> > What you're describing is a situation where the files weren't intended to
> > be temporary after all--apparently they're output. The proper solution is
> > of course to save your plots instead:
> >
> >
> If you want to save and view this output in a temporary directory, you can
> get one with tmp_dir [1]. And, if you want the old functionality, you can
> use graphics_filename [2]. Note that the latter isn't automatically
> imported to the global namespace, so you need to do it manually. A simple
> way would be
>
> from sage.misc.temporary_file import graphics_filename as gf
>
> And then use it like this:
>
> for i in range(10):
> plot(sin(i*x),-1,1).save(gf())
>
>
>
> [1]
> http://www.sagemath.org/doc/reference/misc/sage/misc/temporary_file.html#sage.misc.temporary_file.tmp_dir
>
> [2]
> http://www.sagemath.org/doc/reference/misc/sage/misc/temporary_file.html#sage.misc.temporary_file.graphics_filename
>
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