Making Python loggers output all messages to stdout in addition to log file Making Python loggers output all messages to stdout in addition to log file python python

Making Python loggers output all messages to stdout in addition to log file


All logging output is handled by the handlers; just add a logging.StreamHandler() to the root logger.

Here's an example configuring a stream handler (using stdout instead of the default stderr) and adding it to the root logger:

import loggingimport sysroot = logging.getLogger()root.setLevel(logging.DEBUG)handler = logging.StreamHandler(sys.stdout)handler.setLevel(logging.DEBUG)formatter = logging.Formatter('%(asctime)s - %(name)s - %(levelname)s - %(message)s')handler.setFormatter(formatter)root.addHandler(handler)


The simplest way to log to stdout:

import loggingimport syslogging.basicConfig(stream=sys.stdout, level=logging.DEBUG)


You could create two handlers for file and stdout and then create one logger with handlers argument to basicConfig. It could be useful if you have the same log_level and format output for both handlers:

import loggingimport sysfile_handler = logging.FileHandler(filename='tmp.log')stdout_handler = logging.StreamHandler(sys.stdout)handlers = [file_handler, stdout_handler]logging.basicConfig(    level=logging.DEBUG,     format='[%(asctime)s] {%(filename)s:%(lineno)d} %(levelname)s - %(message)s',    handlers=handlers)logger = logging.getLogger('LOGGER_NAME')


matomo