Logging output from python

[Barry]

Hi, guys

Basiclly, it is automated testing system. There is a main python script
that handles the testing campagin. This main script will call another
script that will in turn runs a few hundered individual python scripts.


Here is my problem. I want to log everything displayed in the screen
after I start the main python script. Things include unhandled
exceptions , message from print statement and other sources.
Basically, if it is displayed on the screen, I want to log it..


It might not be a pythons specific problem. Does anyone know a small
tool does that job?


Thanks.

 

[Cameron Walsh]

Hi, guys

Basiclly, it is automated testing system. There is a main python script
that handles the testing campagin. This main script will call another
script that will in turn runs a few hundered individual python scripts.


Here is my problem. I want to log everything displayed in the screen
after I start the main python script. Things include unhandled
exceptions , message from print statement and other sources.
Basically, if it is displayed on the screen, I want to log it..


It might not be a pythons specific problem. Does anyone know a small
tool does that job?


Thanks.

If it's on linux you can just redirect the screen output to a file:

python initialfile.py 1>stdout.txt 2>stderr.txt

or if you want standard out and standard error to go to the same file:

python initialfile.py 1>output.txt 2>output.txt

or if you don't want to see anything on standard error:

python initialfile.py 1>output.txt 2>/dev/null


As for windows, I'll test it now...

It turns out you can at least redirect the output to a file, I'm not
sure what it does with standard error or even if it exists or not.

python initialfile.py > output.txt

should work.


Hope it helps,

Cameron.

 

[Gabriel Genellina]

Here is my problem. I want to log everything displayed in the screen
after I start the main python script. Things include unhandled
exceptions , message from print statement and other sources.
Basically, if it is displayed on the screen, I want to log it..

If it's on linux you can just redirect the screen output to a file:

python initialfile.py 1>stdout.txt 2>stderr.txt
[...]

As for windows, I'll test it now...

It turns out you can at least redirect the output to a file, I'm not
sure what it does with standard error or even if it exists or not.

python initialfile.py > output.txt

It's the same syntax as noted for linux above. 1> is the same as > alone.

If ALL the testing is done on a single program (that is, no os.system
or spawn or subprocess...) then you could just replace sys.stdout and
sys.stderr with another open file (or file-like) object.


--
Gabriel Genellina
Softlab SRL

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[MRAB]

Here is my problem. I want to log everything displayed in the screen
after I start the main python script. Things include unhandled
exceptions , message from print statement and other sources.
Basically, if it is displayed on the screen, I want to log it..

If it's on linux you can just redirect the screen output to a file:

python initialfile.py 1>stdout.txt 2>stderr.txt
[...]

As for windows, I'll test it now...

It turns out you can at least redirect the output to a file, I'm not
sure what it does with standard error or even if it exists or not.

python initialfile.py > output.txt

It's the same syntax as noted for linux above. 1> is the same as > alone.

If ALL the testing is done on a single program (that is, no os.system
or spawn or subprocess...) then you could just replace sys.stdout and
sys.stderr with another open file (or file-like) object.

Redirection in Windows is explained here:

http://www.microsoft.com/resources/.../all/proddocs/en-us/redirection.mspx?mfr=true

 

[Leonhard Vogt]

If it's on linux you can just redirect the screen output to a file:

python initialfile.py 1>stdout.txt 2>stderr.txt

As for windows, I'll test it now...

It turns out you can at least redirect the output to a file, I'm not
sure what it does with standard error or even if it exists or not.

python initialfile.py > output.txt

should work.

>cmd

Microsoft Windows XP [Version 5.1.2600]
(C) Copyright 1985-2001 Microsoft Corp.

>type output.py

import sys

print 'This is print.'
sys.stdout.write('This is stdout.write()\n')
sys.stderr.write('This is stderr.write()\n')

>python output.py 1>stdout.txt 2>stderr.txt

>type stdout.txt

This is print.
This is stdout.write()

>type stderr.txt

This is stderr.write()

Seems on XP it works too.

Leonhard