What should go to stdout/stderr and why Python logging write everything to stderr?

[Thomas Passin]

On 1/5/2023 4:28 PM, Weatherby,Gerard wrote:
> logging.basicConfig()
> logging.info(“Nice to know”)
> logging.debug(“Details for when things are funky”)
> logging.warn(“Trouble is brewing”)

Not quite -

 >>> import logging
 >>> logging.basicConfig()
 >>> logging.info("Nice to know")
 >>> logging.debug("Details for when things are funky")
 >>> logging.warn("Trouble is brewing")
<stdin>:1: DeprecationWarning: The 'warn' function is deprecated, use 
'warning' instead
WARNING:root:Trouble is brewing

Only warning level messages are displayed, unless you do some 
configuration, as mentioned in the logging Howto page:

"The default level is WARNING, which means that only events of this 
level and above will be tracked, unless the logging package is 
configured to do otherwise."

So following the Howto:
 >>> logging.basicConfig(level=logging.DEBUG)
 >>> logging.info('So should this')
INFO:root:So should this

: Finally!

Not quite straightforward, though it is in the Howto.  Now about those 
handlers ...

> From: Python-list <python-list-bounces+gweatherby=uchc.edu at python.org> on behalf of Grant Edwards <grant.b.edwards at gmail.com>
> Date: Thursday, January 5, 2023 at 3:31 PM
> To: python-list at python.org <python-list at python.org>
> Subject: Re: What should go to stdout/stderr and why Python logging write everything to stderr?
> *** Attention: This is an external email. Use caution responding, opening attachments or clicking on links. ***
> 
> On 2023-01-05, Thomas Passin <list1 at tompassin.net> wrote:
> 
>> The logging system is so configurable that...
> 
> I find it almost impossible to use unless I copy a working example I
> find somewhere. ;)
> 
> I'm not at all surprised that the OP didn't understand how it
> works. I've been writing Python programs for over 20 years, and it's
> beyond me.
> 
> --
> Grant
> 
> 
> 
> 
> --
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