On Mon, Jan 14, 2019 at 12:00 PM Dima Pasechnik <dimp...@gmail.com> wrote:
>
> Turns out it's due to the script reading a parameter, in the usual
> Pythonic way, at the end of the file:
>
> if __name__ == "__main__":
> import sys
> m = int(sys.argv[1])
> compute_alpha(m)
>
> Namely, load() tries to evaluate int(sys.argv[1]), whereas for some
> reason sys.argv[1] is '-i'.
>
> So this is probably not a bug, but deserves mentioning in the documentation.
What I'm wondering is why load() sets `__name__ = '__main__'`
(otherwise it wouldn't be running this code at all).
There might be a good reason, but it also seems like a bad idea
precisely for reasons like this: .sage files that also work as
executables, and thus use the standard `__name__ == '__main__'`
blocking. I don't think load() should cause this code to run. It
might instead be better if it assigned some random-ish module name
based on the .sage filename.
> On Mon, Jan 14, 2019 at 10:42 AM Dima Pasechnik <dimp...@gmail.com> wrote:
> >
> > My student created a sage script crossing.sage that runs by itself,
> > i.e. starting it in bash, with it having the 1st line
> >
> > #!/usr/bin/env sage
> >
> > but an attempt to load("crossing.sage") in Sage gives an error:
> >
> > ValueError Traceback (most recent call last)
> > <ipython-input-1-f92dbb154243> in <module>()
> > ----> 1 load("crossing.sage")
> > /home/dimpase/sage/local/lib/python2.7/site-packages/sage/misc/persist.pyx
> > in sage.misc.persist.load (build/cythonized/sag
> > e/misc/persist.c:2470)()
> > 134
> > 135 if sage.repl.load.is_loadable_filename(filename):
> > --> 136 sage.repl.load.load(filename, globals())
> > 137 return
> > 138
> > /home/dimpase/sage/local/lib/python2.7/site-packages/sage/repl/load.pyc
> > in load(filename, globals, attach)
> > 261 add_attached_file(fpath)
> > 262 with open(fpath) as f:
> > --> 263 exec(preparse_file(f.read()) + "\n", globals)
> > 264 elif ext == '.spyx' or ext == '.pyx':
> > 265 if attach:
> > <string> in <module>()
> > ValueError: invalid literal for int() with base 10: '-i'
> > sage:
> >
> > ---------------------
> >
> > Is this a Sage bug? Any idea what might be going on there?
> >
> > Thanks
> > Dima
>
> --
> You received this message because you are subscribed to the Google Groups
> "sage-devel" group.
> To unsubscribe from this group and stop receiving emails from it, send an
> email to sage-devel+unsubscr...@googlegroups.com.
> To post to this group, send email to sage-devel@googlegroups.com.
> Visit this group at https://groups.google.com/group/sage-devel.
> For more options, visit https://groups.google.com/d/optout.
--
You received this message because you are subscribed to the Google Groups
"sage-devel" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to sage-devel+unsubscr...@googlegroups.com.
To post to this group, send email to sage-devel@googlegroups.com.
Visit this group at https://groups.google.com/group/sage-devel.
For more options, visit https://groups.google.com/d/optout.
