I've opened https://phabricator.wikimedia.org/T326650 on this.

On Jan 4, 2023, at 7:25 PM, Roy Smith <roy@panix.com> wrote:

PS, quoting from https://docs.python.org/3.9/howto/logging.html#logging-advanced-tutorial...

Note It is strongly advised that you do not add any handlers other than NullHandler to your library’s loggers. This is because the configuration of handlers is the prerogative of the application developer who uses your library. The application developer knows their target audience and what handlers are most appropriate for their application: if you add handlers ‘under the hood’, you might well interfere with their ability to carry out unit tests and deliver logs which suit their requirements.

On Jan 4, 2023, at 7:14 PM, Roy Smith <roy@panix.com> wrote:

Pywikibot, even if you're just using it as a library, configures its own complicated logging structure:

   o   "pywiki"

   |   Level Level 11

   |   Propagate OFF

   |   Handler <TerminalHandler <stderr> (INFO)>

   |     Level INFO

   |     Filter <pywikibot.userinterfaces.terminal_interface_base.MaxLevelFilter object at 0x7f7f66dafe50>

   |     Formatter fmt='%(message)s%(newline)s' datefmt=None

   |   Handler <TerminalHandler <stdout> (STDOUT)>

   |     Level STDOUT

   |     Filter <pywikibot.userinterfaces.terminal_interface_base.MaxLevelFilter object at 0x7f7f66daffa0>

   |     Formatter fmt='%(message)s%(newline)s' datefmt=None

   |   Handler <TerminalHandler <stderr> (WARNING)>

   |     Level WARNING

   |     Formatter fmt='%(levelname)s: %(message)s%(newline)s' datefmt=None

   |   |

   |   o<--[pywiki.wiki]

   |       |

   |       o<--"pywiki.wiki.family"

   |           Level NOTSET so inherits level Level 11

   |

Is there any way to make it not do this?  I want to have full control of the logging config in my application.  In particular, I want all the logging to go to my logfile.  Having a library install its own handlers which are hard-wired to a TerminalHandler just complicates that.

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