[issue16539] Turn off 'No handlers could be found for logger' message

[Amaury Forgeot d'Arc]

Amaury Forgeot d'Arc added the comment:

Python 3 has exactly the same documentation:
http://docs.python.org/3.3/howto/logging.html#configuring-logging-for-a-library

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nosy: +amaury.forgeotdarc
resolution: wont fix -> works for me
status: languishing -> closed

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[issue16539] Turn off 'No handlers could be found for logger' message

[anatoly techtonik]

anatoly techtonik added the comment:

I'd say this is a pretty valid issue with "won't fix" or "workaround available" 
resolution.

The question - is the same behavior preserved for Python 3?

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resolution: invalid -> wont fix
status: closed -> languishing

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[issue16539] Turn off 'No handlers could be found for logger' message

[Vinay Sajip]

Vinay Sajip added the comment:

This is not a valid issue. The approach to use is documented:

http://docs.python.org/2.6/library/logging.html#configuring-logging-for-a-library
http://docs.python.org/2.7/howto/logging.html#configuring-logging-for-a-library

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resolution:  -> invalid
status: open -> closed

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[issue16539] Turn off 'No handlers could be found for logger' message

[anatoly techtonik]

anatoly techtonik added the comment:

Nevermind the last message - I was specifying NullHandler as a class, not as an 
instance.

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[issue16539] Turn off 'No handlers could be found for logger' message

[anatoly techtonik]

anatoly techtonik added the comment:

Forgot to mention that bundled NullHandler doesn't work in Python 2.7 and from 
what I can see it is not covered with tests for this version.

Traceback (most recent call last):
  File "", line 1, in 
  File "patch.py", line 124, in fromstring
return PatchSet( StringIO(s) )
  File "patch.py", line 196, in __init__
self.parse(stream)
  File "patch.py", line 512, in parse
warning("error: no patch data found!")
  File "C:\Python27\lib\logging\__init__.py", line 1152, in warning
self._log(WARNING, msg, args, **kwargs)
  File "C:\Python27\lib\logging\__init__.py", line 1258, in _log
self.handle(record)
  File "C:\Python27\lib\logging\__init__.py", line 1268, in handle
self.callHandlers(record)
  File "C:\Python27\lib\logging\__init__.py", line 1307, in callHandlers
if record.levelno >= hdlr.level:
AttributeError: type object 'NullHandler' has no attribute 'level'

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[issue16539] Turn off 'No handlers could be found for logger' message

[anatoly techtonik]

New submission from anatoly techtonik:

It is very annoying. Take this as an example. 'patch' is a module (library) 
that is meant to be used from other programs. Therefore it can not (should not) 
setup handlers for itself.

>>> import patch
>>> patch.PatchSet().parse('7745')
No handlers could be found for logger "patch"

Is it the same for Python 3?

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components: Library (Lib)
messages: 176170
nosy: techtonik, vinay.sajip
priority: normal
severity: normal
status: open
title: Turn off 'No handlers could be found for logger' message
versions: Python 2.7

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