New submission from raybb <rayz3...@gmail.com>:
According to the docs here (https://docs.python.org/3/library/logging.html):
"You don’t need to create specialized Filter classes, or use other classes with
a filter method: you can use a function (or other callable) as a filter. The
filtering logic will check to see if the filter object has a filter attribute:
if it does, it’s assumed to be a Filter and its filter() method is called.
Otherwise, it’s assumed to be a callable and called with the record as the
single parameter."
If I use this code:
def noErrorLogs(param):
return 1 if param.levelno < 40 else 0
logconfig_dict = {
'filters': {
'myfilter': {
'()': noErrorLogs,
}
},
"handlers": {
"console": {
"class": "logging.StreamHandler",
"level": "DEBUG",
"stream": "ext://sys.stdout",
"filters": ["myfilter"]
}
},
"root": {"level": "DEBUG", "handlers": ["console"]},
"version": 1,
}
dictConfig(logconfig_dict)
I get the error "Unable to configure filter 'myfilter'" because "noErrorLogs()
missing 1 required positional argument: 'param'"
However, If I use this code:
def noErrorLogs(param):
return 1 if param.levelno < 40 else 0
logconfig_dict = {
"handlers": {
"console": {
"class": "logging.StreamHandler",
"level": "DEBUG",
"stream": "ext://sys.stdout",
}
},
"root": {"level": "DEBUG", "handlers": ["console"]},
"version": 1,
}
logging.basicConfig()
dictConfig(logconfig_dict)
l = logging.getLogger()
l.handlers[0].addFilter(noErrorLogs)
Then the filter works correctly.
The bug I am reporting is that when using logging.config.dictConfig you cannot
pass in a callable that acts a filter. You can only pass in a class with a
filter method or a function that returns a callable filter.
If this is the expected behavior perhaps the docs should make it clear that
callables cannot be used with dictConfig.
----------
messages: 377791
nosy: raybb
priority: normal
severity: normal
status: open
title: logging.config.dictConfig does not work with callable filters
type: behavior
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Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue41906>
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