[IPython-user] Is there any plan about ipdb?
Fernando.Perez at colorado.edu
Wed Nov 16 21:36:53 CST 2005
> I have used ipython for more than one year and I like it very much,
> it help me to make my life easier, many many thanks to the developers!
> I post a feature request, now when I am under ipython, everythink is
> wonderful, like syntax highlight, tab-completion and many very useful
> magic commands, but when I go into pdb, it seems like I go back to the
> origial python console world. Since now we have ipython instead of
> python, why not create ipdb instead pdb? that will make it perfect!
> Anyway, thanks again!
Well, I also hate the limitations of pdb, which I use quite often. The
problem is that pdb is based on the cmd module, which is fairly different
architecturally from ipython (based on the code module). So mapping one onto
the other is not too easy, and it would require almost a rewrite.
The cmd module is great for quick-and-dirty mini-shells with a few commands,
but IMO it was the wrong design to use for an interactive python debugger,
which is meant to run full python code. It would have been much better if pdb
had been written based on code, with the necessary extensions for frame handling.
Unfortunately the pdb we have works 'OK', so the incentive for writing a whole
new one isn't that great.
An interesting project would be to implement an ipython which inherits from
Bdb (the base class that pdb uses for core debugging functionality), but uses
magics for control. This would solve the problem which pdb has of name
collisions between commands and locals, for example (magics have a
But as you can imagine, right now this is very low on the priority list. I
have a stack of patches to take care of, and two branches where major new work
was done over the summer, waiting to be reactivated. So this is something
which unfortunately won't come from me, at least for a while. I'd love to
have it, but I can live with the limitations of pdb.
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