Issue in Python Logging using dictConfig

Question

Below is the configuration dict i am using:

LOGGING_CONF = {
'version': 1,
'disable_existing_loggers': False,
'formatters': { 
    'verbose': {
        'format': '%(levelname)s %(asctime)s %(module)s %(message)s'
    },
    'simple': {
        'format': '%(levelname)s %(message)s'
    },
},
'handler': { 
    'file': {
        'level': 'DEBUG',
        'class': 'logging.handlers.RotatingFileHandler',
        'formatter': 'verbose',
        'filename': 'D:\workspace\yogasync\codes\code_svn\YogaSync\log\workspacelogconfig.log',
        'maxBytes': 20480,
        'backupCount': 3, 
     },
},
'logger': {
    'extensive': {
        'level':'DEBUG',
        'handlers': 'file'
    },
},

}

in a module where i need to create logs i have inserted the below code:

import logging
import logging.config 
logging.config.dictConfig(LOGGING_CONF)

logger = logging.getLogger('extensive')

logger.info("This is my first log")

When i execute this, no errors are raised, however no logs get created. I am not sure what is missing out. I want to use dictCongif only Please help me with this.

Claudiu · Accepted Answer · 2011-05-04 12:42:21Z

2

You have to add a handler so that something happens with all those loggers. For example,

logfile = logging.handlers.FileHandler("mylog.log")
logfile.setLevel(logging.DEBUG)
logfile.setFormatter(logging.Formatter('%(asctime)s %(levelname)-8s %(module)s: %(message)s'))
logging.getLogger('').addHandler(logfile)

answered May 4, 2011 at 12:42

Claudiu

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6 Comments

Arun Over a year ago

We can configure logging in three ways: 1. Creating loggers, handlers, and formatters explicitly using Python code that calls the configuration methods listed above. 2. Creating a logging config file and reading it using the fileConfig() function. 3. Creating a dictionary of configuration information and passing it to the dictConfig() function. you have mentioned the 1st way of logging. i want to do it using 3rd method(dictConfig)

Claudiu Over a year ago

@Arun: oh in this case maybe the loggers key should be a list? it is handlers not handler. so have 'extensive': { 'level': 'DEBUG', 'handlers': ['file']}

Arun Over a year ago

Thank You, it should be handlers not handler and loggers not logger.(Stupid mistake) and yes handlers should be a list. Thanks, you helped me getting a beer bottle . ;)

Claudiu Over a year ago

ohh what is the malted liquor, what gets you drunker quicker, what comes in bottles or in caaans? BEER!

Arun Over a year ago

at our workplace we keep chilled beer ready for those who finish there days work at the earlist and today its CARLSBERG in bottle

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