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logger.py

Use StreamToLogger to monitor all output from applications which should write to a log file rather than an interactive terminal. It will forward print() calls, which would otherwise be lost, into the logger.

  • Stream redirection: The StreamToLogger class allows redirection of standard output and error streams to a logging instance.

Example Usage

Redirect stdout and stderr to a logger.

Add this boilerplate code to the top of a Python file. Subsequent print() output will redirect to the log file along with output from log.info() and log.warning().

python

logging.basicConfig(
    filename='output.log',
    format='%(asctime)s %(levelname)s: %(message)s',
    level=logging.INFO
)
log = logging.getLogger(__name__)
sys.stdout = StreamToLogger(log, logging.INFO)
sys.stderr = StreamToLogger(log, logging.ERROR)