sage-mode in Emacs: tab-completion not always working

[Johan S. R. Nielsen]

Hi,
Let's see if Ivan or someone else knowledgeable on sage-mode reads here; better to have the question and answer in public, I thought, than to write the developer directly.

I just started experimenting with sage-mode, and it looks very promising for me. I haven't used python-mode before, either, so the workflow is pretty new to me. Anyway, it seems like tab-completion is not always working. For example, I go to the inferior process and type:

sage: F = GF(2)
sage: F.<Tab>
  ... I get the long list of options
sage: M = Matrix(F, 2, 2, [[0,1],[0,1]])
sage: M.<tab>
  ... I'm told "no completions of M"

Using "M?" spews out the full help text, so sage-mode _can_ figure out which object M is.

Am I doing something wrong here? I am using the 0.9.1 spkg from bitbucket, and I am running Emacs 24.3 with Gallina's python.el.

Thanks,
Johan

[Johan S. R. Nielsen]

Ok, I feel kind of silly now, becasue I can't seem to reproduce the above myself :-S
Something wasn't working so I got the above behaviour, and I had already tried restarting emacs etc., but now everything seems to work perfectly...

[Ivan Andrus]

Hi Johan,

Actually, I can reproduce it here using exactly the input you gave.  Behind the scenes sage-mode runs (for M.<tab>):

%psearch -a M.*

Running this directly allows you to see the exception thrown because the matrix isn't invertible.  I switched to using %psearch recently because I needed to be compatible with old and new versions of ipython.  I'm not an ipython expert, so maybe someone can tell me what I should be using instead.  OTOH, it seems like a bug in Sage since I don't think listing attributes should throw this kind of exception.  I have opened #14760.

-Ivan

P.S. The computer I'm on right now has version 5.8.beta4 so this may have been fixed in a more recent version.

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