Python logging setLevel not logging

Question

Is there anything in this code that would explain why my info messages aren't going into the log. Properly formatted warnings and above are going into both log files.

Initializing logger:

logger = logging.getLogger() f = logging.Formatter('%(asctime)s\n%(levelname)s: %(funcName)s %(message)s') out = logging.handlers.RotatingFileHandler(filename=self.f_stdout, maxBytes=1048576, backupCount=99) err = logging.handlers.RotatingFileHandler(filename=self.f_stderr, maxBytes=1048576, backupCount=99) out.setLevel(logging.INFO) err.setLevel(logging.WARNING) err.setFormatter(f) logger.addHandler(out) logger.addHandler(err)

Usage:

logging.info('this doesnt get logged') logging.warning('this gets logged to stdout and stderr with respective formatting')

Amber · Accepted Answer · 2015-06-06 00:15:24Z

You never actually set the log level of the root logger object itself (the logger variable in your code). Both handlers and loggers have log levels; lines only reach the output if they're above both thresholds.

Since you don't set the root log level, it uses its default (warning). Try adding a call to logger.setLevel(logging.INFO) to change that.

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