log.py 文件源码

def configure_logging():
    # Create handler to log only `DEBUG` and `INFO` messages to stdout stream, and add to logger.
    stdout_handler = logging_.StreamHandler(sys.stdout)
    stdout_handler.setLevel(logging_.DEBUG)
    stdout_level_filter = LevelFilter([logging_.DEBUG, logging_.INFO])
    stdout_handler.addFilter(stdout_level_filter)
    logging.addHandler(stdout_handler)

    # Create handler to log levels greater than `INFO` to stderr stream, and add to logger.
    stderr_handler = logging_.StreamHandler()
    stderr_handler.setLevel(logging_.WARNING)
    logging.addHandler(stderr_handler)

    # Configure format of logged messages.
    formatter = logging_.Formatter(logging_.BASIC_FORMAT)
    stdout_handler.setFormatter(formatter)
    stderr_handler.setFormatter(formatter)