can we save print msg into a file when script running ?

[black]

hi all~

in my .py file there are a few print to trace out some message and i
wonder if we can save it into a specified file when that script get
running. if so, i may just check that file to c how the script is
running. can anyone show me a right direction ?

one million tks~

[Steve Holden]

black wrote:

hi all~

in my .py file there are a few print to trace out some message and i
wonder if we can save it into a specified file when that script get
running. if so, i may just check that file to c how the script is
running. can anyone show me a right direction ?

one million tks~

On Unix platforms you can run your script with a redirection of the
standard output:

python myscript.py > somefile.txt &

[The ampersand runs the command in the background]. Then you can monitor
the content of the output file with

tail -f somefile.txt

which will show you the last part of the file and further additions as
long as you let the tail command run.

regards
Steve
--
Steve Holden [phone] [phone]
Holden Web LLC www.holdenweb.com
PyCon TX 2006 www.python.org/pycon/

[Maksim Kasimov]

black wrote:

hi all~

in my .py file there are a few print to trace out some message and i
wonder if we can save it into a specified file when that script get
running. if so, i may just check that file to c how the script is
running. can anyone show me a right direction ?

one million tks~

script.py >> script.log 2>&1

--
Best regards,
Maksim Kasimov
mailto: ma************@gmail.com

[black]

unluckly i am with windows, anyway tks !

[black]

quote:
=======================
script.py >> script.log 2>&1
=======================

what does 2>&1 mean pls ?

[Peter Otten]

black wrote:

in my .py file there are a few print to trace out some message and i
wonder if we can save it into a specified file when that script get
running. if so, i may just check that file to c how the script is
running. can anyone show me a right direction ?

If you don't feel comfortable with the command line you can stick

import sys
sys.stdout = open("mylogfile.txt", "w")

at the beginning of your file.

Peter

[Steve Holden]

black wrote:

quote:
=======================
script.py >> script.log 2>&1
=======================

what does 2>&1 mean pls ?

It's Unix shell-speak for "send the standard error stream to the same
place as the standard output". Probably a syntax error on Windows ...

regards
Steve
--
Steve Holden [phone] [phone]
Holden Web LLC www.holdenweb.com
PyCon TX 2006 www.python.org/pycon/

[Fredrik Lundh]

Steve Holden wrote:

what does 2>&1 mean pls ?
It's Unix shell-speak for "send the standard error stream to the same
place as the standard output". Probably a syntax error on Windows ...

more test.py import sys
sys.stdout.write("stdout!\n")
sys.stderr.write("stderr!\n")
python test.py >out stderr!
python test.py 2>out stdout!
python test.py >out 2>&1
more out stdout!
stderr!
ver

Microsoft Windows XP [Version 5.1.2600]

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