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]

Dustin Lee wrote:

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.

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]

Peter Hansen wrote:

Dustin Lee wrote:

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.

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

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]

qh****@gmail.com wrote:

Peter Hansen wrote:

The best approach, if it's really intended to be a debugging
aid, might be to learn about "pdb" ....

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.

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