CODEWITHSUNDEEP
pythonpython-2.7logging
Kin
Kin

Reputation: 4596

How to log to file and console at the same time with logging?

I need to log data to file and also to console. I setup it like this:

# set up logging
logging.basicConfig(level    = logging.INFO,
                    format   ='%(asctime)s - %(name)s - %(levelname)s - %(message)s',
                    datefmt  ='%Y-%m-%d %H:%M:%S',
                    handlers=[logging.FileHandler(dir + '/log.log'), logging.StreamHandler()]
                    )

Then i add data like this: logging.info('Server started'). In console i see the text, but file is empty. If I delete tgis file python creates new one, but still it is empty.

Upvotes: 2

Views: 3661

Answers (1)

Shadow9043
Shadow9043

Reputation: 2260

Its just a case of setting of multiple handlers for the same error level.

Remove basicConfig line and do something similar to below

See this example of how to do this:

import logging

log_formatter = logging.Formatter('%(asctime)s %(levelname)s %(funcName)s(%(lineno)d) %(message)s', 
                                  datefmt='%d/%m/%Y %H:%M:%S')

#File to log to
logFile = 'C:\\Temp\\log'

#Setup File handler
file_handler = logging.FileHandler(logFile)
file_handler.setFormatter(log_formatter)
file_handler.setLevel(logging.INFO)

#Setup Stream Handler (i.e. console)
stream_handler = logging.StreamHandler()
stream_handler.setFormatter(log_formatter)
stream_handler.setLevel(logging.INFO)

#Get our logger
app_log = logging.getLogger('root')
app_log.setLevel(logging.INFO)

#Add both Handlers
app_log.addHandler(file_handler)
app_log.addHandler(stream_handler)

#Write some Data
while True:
    app_log.info("data")

Upvotes: 11

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