drop into the interpreter

Dan Thompson dth at vxs.com
Fri Aug 13 14:25:18 CEST 2004


Thank you much Ray... this is exactly what I needed.  I use the shell almost
exclusively and debugging through it helps with this little snippet.

Hoang Do
hoang at jotsite.com

"Ray Buvel" <rlbuvel at gmail.com> wrote in message
news:eh2Tc.92478$vN3.34773 at twister.rdc-kc.rr.com...
> Hoang Do wrote:
> > is there a facility to inspect the run-time of a python script?
> > Essentially, it would execute a script to a set specific point and then
drop
> > into the interpreter.  Something like a "Stop" or "Break"?
>
> This can be done fairly easily by creating a module (lets call it
> interactive) with the following code in it.
> -----------
> import sys,os
>
> def debug_exception(type, value, traceback):
>      # Restore redirected standard I/O
>      sys.stdin = sys.__stdin__
>      sys.stdout = sys.__stdout__
>      sys.stderr = sys.__stderr__
>
>      # Kick the interpreter into interactive mode and call the original
>      # exception handler.
>      os.environ['PYTHONINSPECT'] = '1'
>      sys.__excepthook__(type, value, traceback)
>
> sys.excepthook = debug_exception
> -----------
>
> Now if you import this module and raise an unhandled exception, you will
> be in interactive mode.  In other words, I think the following script
> does what you are asking for.
>
> -----------
> import interactive
>
> raise RuntimeError('Interactive Mode')
> -----------
>
> This also has the advantage that if there are no unhandled exceptions in
> your script, the script runs and terminates normally.
>
> Enjoy,
> Ray Buvel





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