[IronPython] Line numbers in snippets...

[Dino Viehland]

The stack trace is a little odd in that it's given to you as a linked list, and you need to pull it out by indexing into an array, but other than that it's straight forward (the only thing different from what I showed you below is sys.exc_info()[2].tb_next will get you the 2nd frame (and .tb_next on that, and so on)...

Even if you do get it to work let us know how painful it is, that'll help us prioritize considering making this easier in the future.

Do you want to help develop Dynamic languages on CLR? (http://members.microsoft.com/careers/search/details.aspx?JobID=6D4754DE-11F0-45DF-8B78-DC1B43134038)

-----Original Message-----
From: users-bounces at lists.ironpython.com [mailto:users-bounces at lists.ironpython.com] On Behalf Of Alex Henderson
Sent: Monday, May 15, 2006 2:04 PM
To: 'Discussion of IronPython'
Subject: Re: [IronPython] Line numbers in snippets...

Ahhh... hadn't thought about that ;o) hmm... All the calls to the script
engine are wrapped up against a simplified engine interface as it is, as we
are attempting to be at least partly script-engine agnostic... so I can't
see why I couldn't do that, and wrap the exception in one of our own, tagged
with the additional error location info.

I'll give it a go, and if you don't hear from me then you'll know it
worked...  I'm a bit of a python newbie, I assume it's easy enough to grab
hold of a stack trace as well as the line number etc?

Thanks Dino,

 - Alex

> -----Original Message-----
> From: users-bounces at lists.ironpython.com [mailto:users-
> bounces at lists.ironpython.com] On Behalf Of Dino Viehland
> Sent: Tuesday, 16 May 2006 8:55 a.m.
> To: Discussion of IronPython
> Subject: Re: [IronPython] Line numbers in snippets...
>
> Ahh, ok...  Can you wrap the user code you run w/ more python code?  If
> you could then you could do:
>
> try:
>         // run user code
> except:
>         import sys
>         print sys.exc_info()[2].tb_lineno
>         print sys.exc_info()[2].tb_frame.f_code.co_filename
>
> That's the Python way to get this information.  Let us know if that seems
> to burdensome.  If so we could look at a way to expose this information
> via the engine APIs instead of requiring you to create this wrapper.
>
>
> Do you want to help develop Dynamic languages on CLR?
> (http://members.microsoft.com/careers/search/details.aspx?JobID=6D4754DE-
> 11F0-45DF-8B78-DC1B43134038)
>
> -----Original Message-----
> From: users-bounces at lists.ironpython.com [mailto:users-
> bounces at lists.ironpython.com] On Behalf Of Alex Henderson
> Sent: Monday, May 15, 2006 1:48 PM
> To: 'Discussion of IronPython'
> Subject: Re: [IronPython] Line numbers in snippets...
>
> Not quite... my problem is I don't have a PythonSyntaxError thrown, I
> believe that's because I'm actually receiving a python generated
> exception,
> for instance I might catch a PythonNameError when someone incorrectly
> spells
> a variable name... and that doesn't contain any information I can use the
> locate where in the snippet string the error occurred... Is there a way to
> get this information out of the PythonEngine itself perhaps?
>
> The reason I ask that I just want to implement a feature where by a user
> can
> look at a log "view" in our product, see an error has occurred in their
> script, and be able to double click the entry and navigate to our code
> editor and be on the right line for fixing the problem - for this to
> happen
> we need to be able to extract some details of where the error occurred
> when
> using PythonEngine.Execute...
>
> Any ideas I would be greatly appreciated... :)
>
> Chez,
>
>  - Alex
>
> > -----Original Message-----
> > From: users-bounces at lists.ironpython.com [mailto:users-
> > bounces at lists.ironpython.com] On Behalf Of Dino Viehland
> > Sent: Tuesday, 16 May 2006 8:21 a.m.
> > To: Discussion of IronPython
> > Subject: Re: [IronPython] Line numbers in snippets...
> >
> > We recently made a change so that PythonSyntaxError contains a Line,
> > Column, Filename, and some other properties on it that you should be
> able
> > to get at for this information.  Is that what you're looking for?
> >
> >
> > Do you want to help develop Dynamic languages on CLR?
> >
> (http://members.microsoft.com/careers/search/details.aspx?JobID=6D4754DE-
> > 11F0-45DF-8B78-DC1B43134038)
> > -----Original Message-----
> > From: users-bounces at lists.ironpython.com [mailto:users-
> > bounces at lists.ironpython.com] On Behalf Of Alex Henderson
> > Sent: Monday, May 15, 2006 1:09 PM
> > To: 'Discussion of IronPython'
> > Subject: [IronPython] Line numbers in snippets...
> >
> > We've been using IronPython as a scripting engine in one of our products
> > that's in development for a while now, works great :)
> >
> > However when executing code which has syntax errors in it we can't seem
> to
> > get line numbers back from the exception, or find any compilation
> context
> > we
> > can examine for a list of errors - which makes it difficult to diagnose
> > problems obviously.
> >
> > I figure this is probably a limitation of the execute method, unless
> I've
> > missed something... is there a different approach we could use where we
> > will
> > get line numbers when an error occurs?
> >
> > Chez,
> >
> >  - Alex
> >
> > _______________________________________________
> > users mailing list
> > users at lists.ironpython.com
> > http://lists.ironpython.com/listinfo.cgi/users-ironpython.com
> > _______________________________________________
> > users mailing list
> > users at lists.ironpython.com
> > http://lists.ironpython.com/listinfo.cgi/users-ironpython.com
>
> _______________________________________________
> users mailing list
> users at lists.ironpython.com
> http://lists.ironpython.com/listinfo.cgi/users-ironpython.com
> _______________________________________________
> users mailing list
> users at lists.ironpython.com
> http://lists.ironpython.com/listinfo.cgi/users-ironpython.com

_______________________________________________
users mailing list
users at lists.ironpython.com
http://lists.ironpython.com/listinfo.cgi/users-ironpython.com