install filter on logging level in python using dictConfig
if wanted to load from a json file. this is how it should be
{
"version": 1,
"grey": "/x1b[38;21m",
"yellow": "/x1b[33;21m",
"red": "/x1b[31;21m",
"bold_red": "/x1b[31;1m",
"reset": "/x1b[0m",
"filters": {
"audit_filter": {
"()": "app.logs.AuditFilter.AuditFilter",
"param": "audit"
},
"ignore_audit_filter": {
"()": "app.logs.AuditFilter.IgnoreAuditFilter",
"param": "audit"
}
},
"formatters": {
"package_formatter": {
"format": "[%(asctime)s] - [%(levelname)s] - [%(name)s] : %(message)s"
}
},
"handlers": {
"console": {
"class": "logging.StreamHandler",
"level": "DEBUG",
"formatter": "package_formatter"
},
"development_file_handler": {
"class": "logging.FileHandler",
"filename": "../debug.log",
"level": "DEBUG",
"formatter": "package_formatter",
"filters": [
"ignore_audit_filter"
]
},
"audit_file_handler": {
"class": "logging.FileHandler",
"filename": "../audit.log",
"level": "DEBUG",
"formatter": "package_formatter",
"filters": [
"audit_filter"
]
}
},
"loggers": {
"audit": {
"handlers": [
"audit_file_handler"
],
"level": "INFO"
}
},
"root": {
"level": "INFO",
"handlers": [
"console",
"development_file_handler"
]
}
}
initialise and then attach logger and run the logger
use app.logger = logging.getlogger("audit")
run the application
Actually, Tupteq
's answer is not correct in general. The following script:
import logging
import logging.config
import sys
class MyFilter(logging.Filter):
def __init__(self, param=None):
self.param = param
def filter(self, record):
if self.param is None:
allow = True
else:
allow = self.param not in record.msg
if allow:
record.msg = 'changed: ' + record.msg
return allow
LOGGING = {
'version': 1,
'filters': {
'myfilter': {
'()': MyFilter,
'param': 'noshow',
}
},
'handlers': {
'console': {
'class': 'logging.StreamHandler',
'filters': ['myfilter']
}
},
'root': {
'level': 'DEBUG',
'handlers': ['console']
},
}
if __name__ == '__main__':
print(sys.version)
logging.config.dictConfig(LOGGING)
logging.debug('hello')
logging.debug('hello - noshow')
When run, produces the following output:
$ python filtcfg.py
2.7.5+ (default, Sep 19 2013, 13:48:49)
[GCC 4.8.1]
changed: hello
which shows that you can configure filters using dictConfig()
.
You can specify a class name, but it is done with the strangely named ()
key, and it has to include the module name. E.g.:
'filters': {
'errorfilter': {
'()' : '__main__.LoggingErrorFilter',
}
},
See 16.7.2.4. User-defined objects in the documentation.