get_traceback

[half.italian]

Hi,

Is there a function or idoim for returning an exception/traceback
rather than just printing it to stdout? I'm running a deamon where
stdout is going to /dev/null, and I'm not even watching it..until
now. All the functions I found in traceback and sys seemed only to
print the error rather than just returning it, so I resorted to this:

def get_traceback():
import traceback, tempfile
stdout = sys.stdout

f = tempfile.TemporaryFile(mode='w+')
sys.stdout = f

traceback.print_tb(sys.exc_info()[2])
error = f.read()
f.close()

sys.stdout = stdout
return error

Whats the right function?!? Thanks.

~Sean

 

[kyosohma]

Hi,

Is there a function or idoim for returning an exception/traceback
rather than just printing it to stdout? I'm running a deamon where
stdout is going to /dev/null, and I'm not even watching it..until
now. All the functions I found in traceback and sys seemed only to
print the error rather than just returning it, so I resorted to this:

def get_traceback():
import traceback, tempfile
stdout = sys.stdout

f = tempfile.TemporaryFile(mode='w+')
sys.stdout = f

traceback.print_tb(sys.exc_info()[2])
error = f.read()
f.close()

sys.stdout = stdout
return error

Whats the right function?!? Thanks.

~Sean

I use the traceback module as you do and I usually have it email the
traceback to me if there's an error. You could also have the script
redirect stdout to a file object.

Mike

 

[Gabriel Genellina]

Is there a function or idoim for returning an exception/traceback
rather than just printing it to stdout? I'm running a deamon where
stdout is going to /dev/null, and I'm not even watching it..until
now. All the functions I found in traceback and sys seemed only to
print the error rather than just returning it, so I resorted to this:

Read again the docs for the traceback module.
Maybe you are looking for traceback.format_exception(*sys.exc_info()) or
traceback.format_exc()

f = tempfile.TemporaryFile(mode='w+')
sys.stdout = f
traceback.print_tb(sys.exc_info()[2])

In this case you can use StringIO instead of a temporary file, and the
file argument to print_tb instead of swapping sys.stdout

 

[half.italian]

Is there a function or idoim for returning an exception/traceback
rather than just printing it to stdout? I'm running a deamon where
stdout is going to /dev/null, and I'm not even watching it..until
now. All the functions I found in traceback and sys seemed only to
print the error rather than just returning it, so I resorted to this:

Read again the docs for the traceback module.
Maybe you are looking for traceback.format_exception(*sys.exc_info()) or
traceback.format_exc()

f = tempfile.TemporaryFile(mode='w+')
sys.stdout = f
traceback.print_tb(sys.exc_info()[2])

In this case you can use StringIO instead of a temporary file, and the
file argument to print_tb instead of swapping sys.stdout

Thanks Gabriel. That was exactly what I was looking for. Also, I'm
glad to make a connection to the StringIO class. I'm sure I will
remember it the next time I need it.

~Sean

 

[Gabriel Genellina]

Thanks Gabriel. That was exactly what I was looking for. Also, I'm
glad to make a connection to the StringIO class. I'm sure I will
remember it the next time I need it.

Glad to see it helped. Certainly StringIO is a good thing to carry in your
toolbox...