hi all,
I'm finally trying to work clean with the logging lib, but there are still
a few things I can't figure out, even after reading previous topics here
and elsewhere.
Everything about Handlers and Formatters kinda make sense, I'm not too
concerned about it. Instead, what bugs me is more the parent/child
relationship with the root.
*(for all my experiments, I'm using pymel's tool to vizualise my logging
hierarchy)*
*What do I want to achieve:*
I' like to create one main logger, under the root, when initializing my
program, and then mimic my project hierarchy in the logger, so that I have
full control on the entire verbosity.
So if my program looks like this:
my_app
|__ child01.py
|__ child02.py
I'd like to have something like this in my loggers:
root (created by Maya)
|__ my_app
|__ my_app.child01
|__ my_app.child02
However, when trying to do this, there are many things that don't make
sense to me:
1. If I look at PyMel, they are using the "children" property, and when I
use it in maya, it sometimes works, sometimes not. I can't understand the
logic. Looks like the children attribute is created only when there are
children, which sounds like a weird design to me. Am I missing something?
Furthermore, even though I can use logging.root.children in maya, this
simply does not seem to exist outside of maya (python2 or python3), even
though the logging.__version__ is the same
ex:
mainLog = logging.getLogger("my_tool") # meant to be the parent for my
entire app
child1 = logging.getLogger("my_tool.child1") # similar to
mainLog.getChild("child1"), correct?
child1.parent.name
>>> my_tool
hasattr(mainLog, "children")
>>> False
wtf???? child1's parent is mainLog, but mainLog doesn't have a child?
2. How is it possible that I have twice the same logger, at the same level?
If I run several time my tool, I end up with root.my_logger being here
twice or more. I thought the whole point of the logging was to behave like
a singleton, and logging.getLogger("my_app") would return me the existing
logger instance for my_app, if exists, create it otherwise. Instead, I end
up with 2 loggers named the same, and apparently at the same level of
hierarchy:
for x in logging.root.children:
print x.name
>>> will return me several time the same name. If I want to do it on
purpose, I can't
3. Is there, somewhere, I page I can look at, with a clean logging system?
I didn't detail too much all the examples or put screenshots because this
email is long enough already, but I can provide totally more info if needed
ofc =]
If anyone has an explanation for me, that' would be reeeeally appreciated!
Thank you so much !
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