source: loggingpy/tudelft_utilities_logging/ReportToFile.py

from logging import Logger
import logging
from typing import cast

from tudelft_utilities_logging.Reporter import Reporter


# initialize the logging, otherwise it seems not to work properly
logging.basicConfig()

class ReportToFile ( Reporter ):
        '''
        dumps the reported messages into a log file with the
        given name.
        This really tries hard to avoid any writing to 
        stdout/stderr, because those are used
        for the communicatino to the party.
        '''

        def __init__(self, logname:str):
                '''
                @param logname the name for the Logger
                '''
                super().__init__()
                self._logger:Logger = logging.getLogger(logname)
                # HACK to remove parent. Parent prints to stdout and 
                # preventing that is exactly why we have a logger here.
                self._logger.parent=cast(Logger, None)
                handler = logging.FileHandler(logname+".log")
                formatter = logging.Formatter('%(asctime)s - %(name)s - %(levelname)s - %(message)s')
                handler.setFormatter(formatter)
                self._logger.addHandler(handler)
                self._logger.setLevel(logging.INFO)

        def log(self, level:int , msg:str, thrown: BaseException=None) -> None:
                # We use the internal function, the only way to include our exception...
                self._logger._log(level=level, msg=msg, args=[], exc_info=thrown,\
                        stack_info=True if thrown else False)