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classification
Title: _loggerClass is initialized twice
Type: Stage: resolved
Components: Library (Lib) Versions:
process
Status: closed Resolution: fixed
Dependencies: Superseder:
Assigned To: Nosy List: python-dev, serhiy.storchaka, vinay.sajip
Priority: normal Keywords:

Created on 2015-01-02 16:04 by serhiy.storchaka, last changed 2022-04-11 14:58 by admin. This issue is now closed.

Messages (5)
msg233313 - (view) Author: Serhiy Storchaka (serhiy.storchaka) * (Python committer) Date: 2015-01-02 16:04
In Lib/logging/__init__.py at line 1089 _loggerClass is initialized to None. The code in Manager.getLogger() expects that it can be None. But at line 1549 _loggerClass is initialized to Logger. And there is no official way to set it to None. Looks as either initialization to None and the code in Manager.getLogger() are redundant or initialization to Logger is redundant.
msg233315 - (view) Author: Vinay Sajip (vinay.sajip) * (Python committer) Date: 2015-01-02 16:46
The code in Manager.getLogger() allows an overriding logger class for that manager instance only - if it's not set (which is the default), it uses the module global _loggerClass. The lines

rv = (self.loggerClass or _loggerClass)(name)

indicate this.

The module global _loggerClass is initialized to None initially, simply so that it can be defined before being used in Manager (so really, for readability). Later, after Logger is defined, _loggerClass is set to Logger.

Is this causing some actual problem?
msg233317 - (view) Author: Serhiy Storchaka (serhiy.storchaka) * (Python committer) Date: 2015-01-02 18:02
> Is this causing some actual problem?

No, this does not cause actual problem except that it looks confusing. So really this decreased readability to me.
msg233321 - (view) Author: Vinay Sajip (vinay.sajip) * (Python committer) Date: 2015-01-02 18:59
Okay, I'll see if I can make it clearer.
msg233515 - (view) Author: Roundup Robot (python-dev) (Python triager) Date: 2015-01-06 10:56
New changeset 8bfe230db0bc by Vinay Sajip in branch 'default':
Closes #23151: Removed unnecessary initialization.
https://hg.python.org/cpython/rev/8bfe230db0bc
History
Date User Action Args
2022-04-11 14:58:11adminsetgithub: 67340
2015-01-06 10:56:23python-devsetstatus: open -> closed

nosy: + python-dev
messages: + msg233515

resolution: fixed
stage: resolved
2015-01-02 18:59:26vinay.sajipsetmessages: + msg233321
2015-01-02 18:02:49serhiy.storchakasetmessages: + msg233317
2015-01-02 16:46:06vinay.sajipsetmessages: + msg233315
2015-01-02 16:04:33serhiy.storchakacreate