Andrius Laukavičius <anlauka...@gmail.com> added the comment: Ok. Thanks for the clarification.
On Thu, Mar 7, 2019, 08:13 Vinay Sajip <rep...@bugs.python.org> wrote: > > Vinay Sajip <vinay_sa...@yahoo.co.uk> added the comment: > > The StreamHandler allows you to specify *exactly* which stream you want to > use to log to; sys.stderr is provided as a convenient default argument > because that's what a lot of people want a lot of the time. > > This is typically done at logging configuration time, or whenever a > StreamHandler is created. This is done implicitly by your logging.warning() > call (as documented, this calls logging.basicConfig(), which adds a > StreamHandler using whatever sys.stderr is set to at the time the > StreamHandler is instantiated). Also documented is that basicConfig() is > only effective once (it will not do anything if a handler has already been > added to the root logger - it is only meant to be use for simple one-off > scripts). The documentation for basicConfig() is clear: > > "Does basic configuration for the logging system by creating a > StreamHandler with a default Formatter and adding it to the root logger. > The functions debug(), info(), warning(), error() and critical() will call > basicConfig() automatically if no handlers are defined for the root logger. > > This function does nothing if the root logger already has handlers > configured for it." > > If you want to use the real console streams, don't use logging.warning(), > but instead explicitly call basicConfig() using __stderr__, as Peter says. > Alternatively, use the approach suggested in the cookbook for > context-sensitive logging: > > > https://docs.python.org/3/howto/logging-cookbook.html#using-a-context-manager-for-selective-logging > > Closing, as this is not a bug in logging. > > ---------- > resolution: -> not a bug > stage: -> resolved > status: open -> closed > > _______________________________________ > Python tracker <rep...@bugs.python.org> > <https://bugs.python.org/issue36193> > _______________________________________ > ---------- _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue36193> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
