python execution path

[Dustin Lee]

I'm wondering if there is a way to get python to show each line as it
is executed, sort of like sh -x does for shell programs. Seems like
this would be a nice debugging aid.

dustin

[Peter Hansen]

Re: python execution path

Dustin Lee wrote:[color=blue]
> I'm wondering if there is a way to get python to show each line as it
> is executed, sort of like sh -x does for shell programs. Seems like
> this would be a nice debugging aid.[/color]

The best approach, if it's really intended to be a debugging
aid, might be to learn about "pdb", starting perhaps with the
following line inserted shortly above where you think your
bug might be:

import pdb; pdb.set_trace()

(run the code, wait for the prompt, type "?" for help, then
read the docs ;-) )

-Peter

[qhfgva@gmail.com]

Re: python execution path

Peter Hansen wrote:[color=blue]
> Dustin Lee wrote:[color=green]
> > I'm wondering if there is a way to get python to show each line as[/color][/color]
it[color=blue][color=green]
> > is executed, sort of like sh -x does for shell programs. Seems[/color][/color]
like[color=blue][color=green]
> > this would be a nice debugging aid.[/color]
>
> The best approach, if it's really intended to be a debugging
> aid, might be to learn about "pdb", starting perhaps with the
> following line inserted shortly above where you think your
> bug might be:
>
> import pdb; pdb.set_trace()
>
> (run the code, wait for the prompt, type "?" for help, then
> read the docs ;-) )
>
> -Peter[/color]

This is more of a what if-ish question I guess. I use pdb fairly
regularly, I'm just looking to extend my debugging toolkit. I saw an
article recently about how perl has the sh -x type functionality and I
was curious if anything like that was possible in python. Not entirely
sure how it would make my life better, but it seems intriguing.

[Peter Hansen]

Re: python execution path

qhfgva@gmail.co m wrote:[color=blue]
> Peter Hansen wrote:[color=green]
>>The best approach, if it's really intended to be a debugging
>>aid, might be to learn about "pdb" ....[/color]
>
> This is more of a what if-ish question I guess. I use pdb fairly
> regularly, I'm just looking to extend my debugging toolkit. I saw an
> article recently about how perl has the sh -x type functionality and I
> was curious if anything like that was possible in python. Not entirely
> sure how it would make my life better, but it seems intriguing.[/color]

Ah. In that case, investigate sys.settrace(). There are doubtless
a variety of recipes and snippets available in either the Cookbook
or in the mailing list archives, after you do the basic reading in
http://www.python.org/doc/2.4/lib/module-sys.html .

-Peter