> I've had bad experiences in the past with dictionary-based APIs. They seem
> "simpler" in the short run, because the user "only needs to create some
> dictionaries". Once the complexity of that nested dictionary grows to a
> certain
> point, though, one has to refer back to documentation constantly to make sure
Fair point, and agreed that the schema needs some care, here's roughly what I'm
thinking of as an example configuration (YAML):
formatters:
brief:
format: '%(levelname)-8s: %(name)-15s: %(message)s'
precise:
format: '%(asctime)s %(name)-15s %(levelname)-8s %(message)s'
filters:
allow_foo:
name: foo
handlers:
console:
class : logging.StreamHandler
formatter: brief
level : INFO
stream : sys.stdout
filters: [allow_foo]
file:
class : logging.handlers.RotatingFileHandler
formatter: precise
filename: logconfig.log
maxBytes: 1024
backupCount: 3
debugfile:
class : logging.FileHandler
formatter: precise
filename: logconfig-detail.log
mode: a
loggers:
foo:
level : ERROR
handlers: [debugfile]
spam:
level : CRITICAL
handlers: [debugfile]
propagate: no
bar.baz:
level: WARNING
root:
level : DEBUG
handlers : [console, file]
It's not too deeply nested, and I can't see any need for it being more deeply
nested. It more or less mirrors the way you'd have to write the corresponding
ConfigParser-compatible configuration, but if you use a dict as a common
format, you have the benefits which I mentioned of supporting JSON, YAML or
Python code in a Django settings.py.
> the structure conforms to the "schema". Building a simple config tree using
> light-weight classes with documented APIs tends to be more sustainable in the
> long run.
When you say 'config tree using light-weight classes', I presume you mean a
parallel set of classes to the actual logging classes which will be
instantiated? ISTM logging classes are already reasonably usable for
programmatic configuration, but this doesn't address e.g. updating
configurations easily without program code changes, or the ability to configure
from say a YAML node, where YAML may be being used for application
configuration as a whole. (Unless of course I've misunderstood what you're
getting at.)
Regards,
Vinay Sajip
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