How to use the gillespy2.core.log.addHandler function in gillespy2

Path to the workflow directory
    '''
    formatter = log.handlers[0].formatter # gillespy2 log formatter
    fh_is_needed = True
    for handler in log.handlers:
        if type(handler) is logging.StreamHandler:
            handler.stream = sys.stderr # Reset the stream to stderr
            handler.setLevel(logging.ERROR) # Only log error and critical logs to console 
        elif type(handler) is logging.FileHandler:
            fh_is_needed = False # File Handler was already added to the log
    # Add the file handler if it not in the log already
    if fh_is_needed:
        fh = logging.FileHandler(log_path) # initialize file handler
        fh.setLevel(logging.WARNING) # log warning, error, and critical logs to file
        fh.setFormatter(formatter) # add gillespy2 log formatter
        log.addHandler(fh) # add file handler to log