Separate output for log file and stdout

[Kam-Hung Soh]

On Tue, 20 May 2008 06:58:28 +1000, <amit.uttam at gmail.com> wrote:

> On May 16, 6:37 pm, Ben Finney <bignose+hates-s... at benfinney.id.au>
> wrote:
>> amit.ut... at gmail.com writes:
>> > I've recently jumped big time into python and I'm working on a
>> > software program for testing automation.
>>
>> Welcome, to both fields :-)
>>
>
> Thanks! I am having a great time learning and coding in python. It's
> an amazing programming language.
>
>> > I had a question about proper logging of output. What I would like
>> > is:
>>
>> >  1. a function syslog (to log output to log file only)
>> >  2. a function stdout (to log output to stdout only)
>> >  3. a function sslog (to log output to both log and stdout)
>>
>> > Right now I am using StandOut module
>>
>> Have you investigated the 'logging' module in the Python standard
>> library <URL:http://www.python.org/doc/lib/module-logging>? It appears
>> to meet your listed requirements, without need of external
>> dependencies.
>
> Hmm..Yeah I didn't realize python had its own standard logging
> facility. I took a look at it and it seems to do the job. However, the
> output seems to be syslog style output. In the program I am writing,
> the log file stores all the output of the commands being run (e.g. tcl
> scripts, etc). Will this be possible using the built in python logging
> module?
>
> Thanks,
> Amit
> --
> http://mail.python.org/mailman/listinfo/python-list
>

You can define the format of the log output in basicConfig(), for example:

 from logging import basicConfig, error, info, INFO
...
   basicConfig(
       datefmt='%Y%m%d_T%H%M%S',
       filemode='a',
       filename=LOG_PATH,
       format='%(asctime)s,%(levelname)s,%(message)s',
       level=INFO
   )

If you want to log the output of other commands in your log file, you can  
connect a pipe to that command.  Maybe look at "subprocess -- Subprocess  
management" in http://docs.python.org/lib/module-subprocess.html

-- 
Kam-Hung Soh <a href="http://kamhungsoh.com/blog">Software Salariman</a>