Is there anyone using loguru (loguru 0.5.3 in my case) successfully in a library?


In my __init__.py in mylib I do

logger.disable('mylib')

which definitely works. I don't get any more logging.

I "pip install ." the library, then in mytest.py I do

import mylib
logger.enable('mylib')

expecting that it would report any log messages above level DEBUG, just
as it does when I don't disable logging. Unfortunately it doesn't
have any effect; it doesn't report any logging from mylib.

I have verified that __name__ is visible in the library and is 'mylib'.

I would also have expected that logger.enable(None) would turn all the
logging on everywhere but it seems not.

I have probably misunderstood how logger.enable() is supposed to be
used. Can anyone share a brief example?

Roy

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On 2023-04-30 16:40, Roy Hann wrote:

Is there anyone using loguru (loguru 0.5.3 in my case) successfully in a library?

In my __init__.py in mylib I do

logger.disable('mylib')

which definitely works. I don't get any more logging.

I "pip install ." the library, then in mytest.py I do

import mylib
logger.enable('mylib')

expecting that it would report any log messages above level DEBUG, just
as it does when I don't disable logging. Unfortunately it doesn't
have any effect; it doesn't report any logging from mylib.

I have verified that __name__ is visible in the library and is 'mylib'.

I would also have expected that logger.enable(None) would turn all the logging on everywhere but it seems not.

I have probably misunderstood how logger.enable() is supposed to be
used. Can anyone share a brief example?

According to the docs, the argument is the name of the module.

In your example, the name of the module (i.e. file) is "__init__";
"mylib" is the name of the package.

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MRAB wrote:

On 2023-04-30 16:40, Roy Hann wrote:

Is there anyone using loguru (loguru 0.5.3 in my case) successfully in a
library?


In my __init__.py in mylib I do

logger.disable('mylib')

which definitely works. I don't get any more logging.

I "pip install ." the library, then in mytest.py I do

import mylib
logger.enable('mylib')

expecting that it would report any log messages above level DEBUG, just
as it does when I don't disable logging. Unfortunately it doesn't
have any effect; it doesn't report any logging from mylib.

I have verified that __name__ is visible in the library and is 'mylib'.

I would also have expected that logger.enable(None) would turn all the
logging on everywhere but it seems not.

I have probably misunderstood how logger.enable() is supposed to be
used. Can anyone share a brief example?

According to the docs, the argument is the name of the module.

In your example, the name of the module (i.e. file) is "__init__";
"mylib" is the name of the package.

Thanks for taking a look at this. I will continue to play around with
it using your suggestion, but according to the snippets and recipes
for loguru at https://loguru.readthedocs.io/en/stable/resources/recipes.html#configuring-loguru-to-be-used-by-a-library-or-an-application
I need to refer to the package name in disable() in __init__.py, not the module/file name, and so I expect to use it in enable() in my main.
Also, as mentioned, I have already verified that __name__ in my
package is referring to the package name not the module.

Since every package will have a __init__.py even if it's empty, using
the module name to control logging by package would be difficult.

Or so I say. My code isn't working so I am wrong about some or all
of this. I'll keep tinkering and looking out for advice/suggestions
here.

Roy

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Roy Hann wrote at 2023-4-30 15:40 -0000:

Is there anyone using loguru (loguru 0.5.3 in my case) successfully in a >library?
...
import mylib
logger.enable('mylib')

expecting that it would report any log messages above level DEBUG, just
as it does when I don't disable logging.

Have you configured the logging system?

Note that `logging.config.fileConfig` may do strange things
regarding disabling (due to its default parameter `disable_existing_loggers=True`).
I had several cases of missing log entries because `fileConfig`
had disabled already existing loggers.

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Dieter Maurer wrote:

Roy Hann wrote at 2023-4-30 15:40 -0000:

Is there anyone using loguru (loguru 0.5.3 in my case) successfully in a >>library?
...
import mylib
logger.enable('mylib')

expecting that it would report any log messages above level DEBUG, just
as it does when I don't disable logging.

Have you configured the logging system?

Note that `logging.config.fileConfig` may do strange things
regarding disabling (due to its default parameter `disable_existing_loggers=True`).
I had several cases of missing log entries because `fileConfig`
had disabled already existing loggers.

Thank you for the response Dieter.

I am using the loguru package, not the logging package.

I think my next step is going to have be creating a minimal test
case to post on stackoverflow. :-P

Roy

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