Python: How to run a script1 from script2 and DUPLICATE script1's output (stdout, stderr) in script2 for logging (into a file)

Question

I have two python scripts: script1.py and script2.py

I want to run script1 from script2 (os.system, subprocess.Popen, ..) and then log script1's output (stdout, stderr) to a file log.txt, while still seeing script1's and script2's outputs on my terminal (as I would see, without the logging feature), as the are printed on ..

N.B.: It essential that log.txt exactly reflects the output (stdout, stderr) i would get on screen/terminal, corresponding to script1's run.

Thanks in advance for your kind help.

dOpP

sorin · Accepted Answer · 2011-05-28 09:16:11Z

1

Currently there is no function in python standard library that does this but you can use tendo.tee().

answered May 28, 2011 at 9:16

sorin

173k194 gold badges582 silver badges861 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

sorin Over a year ago

@dOpP I didn't had time to write a documentation for the library, but if it is needed file a bug, maybe this will motivate me to write the doc for it.

Nick Bastin · Accepted Answer · 2011-05-28 09:27:50Z

1

Use the subprocess module (not os.system). Send stdout and stderr to a pipe and capture them in local variables (using communicate probably). Once you have them in local vars you can both print them and write them to a file (so you're probably most of the way there already).

Something like:

log = open("log.txt", "w+")
p = subprocess.Popen(['/usr/bin/env', 'python', 'script1.py'], stdout=subprocess.PIPE, stderr=subprocess.PIPE)
(out, err) = p.communicate()
print out,err
log.write(out)
log.write(err)

edited May 28, 2011 at 9:27

answered May 28, 2011 at 9:14

Nick Bastin

31.4k7 gold badges62 silver badges78 bronze badges

1 Comment

dOpP Over a year ago

Hello guys, Once more, thanks to every one who answered me (sorin, nick b., etc.).

Collectives™ on Stack Overflow

Python: How to run a script1 from script2 and DUPLICATE script1's output (stdout, stderr) in script2 for logging (into a file)

2 Answers 2

1 Comment

1 Comment

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

1 Comment

1 Comment

Your Answer

Sign up or log in

Post as a guest

Related