On 9/4/05, Michael Hudson <[EMAIL PROTECTED]> wrote: > Christopher Armstrong <[EMAIL PROTECTED]> writes: > > > I had the idea to create a fake Traceback object in Python that > > doesn't hold references to any frame objects, but is still able to be > > passed to 'raise' and formatted as tracebacks are, etc. Unfortunately, > > raise does a type check on its third argument and, besides, it seems > > the traceback formatting functions are very reliant on the internal > > structure of traceback objects, so that didn't work. > > An option you may not have considered is to ditch the C code that > formats tracebacks and always use traceback.py (this has a few obvious > problems -- what do you do if traceback.py fails to import, what if > formatting the traceback raises an error -- but nothing too > horrendous, I think). > > Less duplication and less C code are always good things (IMHO, at > least).
The problem is, I can't tell Python to use traceback.py to format specifically these tracebacks. Or are you suggesting replacing all of Python's internal traceback printing stuff with traceback.py? I think that's a great idea, and it's what I assumed happened before I found these C-coded printing routines. On the other hand, that has the same problem that the "change to python attribute access" has, specifically that it *requires* a change to CPython itself, and can't be done in an extension module. But that's a purely selfish concern. :) I'm pretty close to getting the extension module that constructs frames, but I'm dealing with segfaults now. Man, PyFrame_New does some weird stuff. :) I may try for another day to get the extension module working, then perhaps give up and try on one of the hacking-CPython strategy. > > One concern is that I really don't like requiring C modules to use > > Twisted; all of the ones currently in there are optional. > > Well, presumably this is optional too -- you only need it if you want > informative tracebacks... Yes, that's true. -- Twisted | Christopher Armstrong: International Man of Twistery Radix | -- http://radix.twistedmatrix.com | Release Manager, Twisted Project \\\V/// | -- http://twistedmatrix.com |o O| | w----v----w-+ _______________________________________________ Python-Dev mailing list Python-Dev@python.org http://mail.python.org/mailman/listinfo/python-dev Unsubscribe: http://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com
