When trying to load the following config file, I get an error
``ConfigParser.NoOptionError: No option 'handlers' in section: 'logger_0'`` (in
both Python 2.6.4 and Python 3.1.1 on OSX, obviously ConfigParser is spelled
configparser in 3.1):
[loggers]
keys=root,0
[handlers]
keys=console
[formatters]
keys=simple
[logger_root]
handlers=console
[logger_0]
level=DEBUG
qualname=0
[handler_console]
class=StreamHandler
formatter=simple
args=()
[formatter_simple]
format=%(asctime)s:%(levelname)-8s:%(name)s::%(message)s
the goal is simply to have a logging level different on ``0`` than it is on
``root``, but to get it I have to include a handler on ``0`` and stop
propagation (or messages are displayed on both root and 0).
Do note that this behavior (of mandating handlers) does *not* happen when
loggers are configured programmatically.
Should this be considered a bug? Worthy of opening a request on the tracker?
And while I'm at it, a few other oddities/annoyances I noticed in logging:
* have to specify the `root` logger in loggers/keys, even though it's mandatory
to configure the root logger, or I get the following error::
Traceback (most recent call last):
File "test.py", line 6, in <module>
logging.config.fileConfig('logging.conf')
File
"/opt/local/Library/Frameworks/Python.framework/Versions/3.1/lib/python3.1/logging/config.py",
line 82, in fileConfig
_install_loggers(cp, handlers, disable_existing_loggers)
File
"/opt/local/Library/Frameworks/Python.framework/Versions/3.1/lib/python3.1/logging/config.py",
line 183, in _install_loggers
llist.remove("root")
ValueError: list.remove(x): x not in list
* the ``args`` option is required when defining a handler, even in the example
above where the handler doesn't take any argument (mandatory ones, anyway)
* Logger.log() doesn't take level names, only numerical levels, even after
having called ``addLevelName``. This makes logging with custom levels much less
clear as one has to write something along the lines of ``logging.log(100,
'Houston, we have a problem')`` instead of the clearer
``logging.log('PANTS_ON_FIRE', 'Houston, we have a problem')``. Note that since
the introduction of _checkLevel fixing that is trivial:
diff -r dafc54104884 Lib/logging/__init__.py
--- a/Lib/logging/__init__.py Sun Jan 31 14:17:25 2010 +0100
+++ b/Lib/logging/__init__.py Mon Feb 01 22:21:03 2010 +0100
@@ -1146,13 +1146,14 @@
logger.log(level, "We have a %s", "mysterious problem", exc_info=1)
"""
- if not isinstance(level, int):
+ try:
+ rv = _checkLevel(level)
+ except (TypeError, ValueError):
if raiseExceptions:
- raise TypeError("level must be an integer")
- else:
- return
- if self.isEnabledFor(level):
- self._log(level, msg, args, **kwargs)
+ raise
+
+ if self.isEnabledFor(rv):
+ self._log(rv, msg, args, **kwargs)
def findCaller(self):
"""
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