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#!/usr/bin/env python
# -*- coding: utf-8 -*-
from pathlib import Path
import logging
class BaseLogger:
"""
Class for defining logger.
"""
_unexecuted_configure = True
@classmethod
def get_logger(cls, name: str) -> logging.Logger:
"""
Set logger.
Args:
name (str): If needed, potentially hierarchical name is desired, eg. lib.net, lib.dataloader, etc.
For the details, see https://docs.python.org/3/library/logging.html?highlight=logging#module-logging.
Returns:
logging.Logger: logger
"""
if cls._unexecuted_configure:
cls._init_logger()
return logging.getLogger('nervus.{}'.format(name))
@classmethod
def _init_logger(cls) -> None:
"""
Configure logger.
"""
_root_logger = logging.getLogger('nervus')
_root_logger.setLevel(logging.DEBUG)
formatter = logging.Formatter('%(asctime)s - %(levelname)s - %(message)s')
log_dir = Path('logs')
log_dir.mkdir(parents=True, exist_ok=True)
log_path = Path(log_dir, 'log.log')
# file handler
## upper warning
fh_err = logging.FileHandler(log_path)
fh_err.setLevel(logging.WARNING)
fh_err.setFormatter(formatter)
fh_err.addFilter(lambda log_record: not ('BdbQuit' in str(log_record.exc_info)) and (log_record.levelno >= logging.WARNING))
_root_logger.addHandler(fh_err)
## lower warning
fh = logging.FileHandler(log_path)
fh.setLevel(logging.DEBUG)
fh.addFilter(lambda log_record: log_record.levelno < logging.WARNING)
_root_logger.addHandler(fh)
# stream handler
## upper warning
ch_err = logging.StreamHandler()
ch_err.setLevel(logging.WARNING)
ch_err.setFormatter(formatter)
ch_err.addFilter(lambda log_record: log_record.levelno >= logging.WARNING)
_root_logger.addHandler(ch_err)
## lower warning
ch = logging.StreamHandler()
ch.setLevel(logging.DEBUG)
ch.addFilter(lambda log_record: log_record.levelno < logging.WARNING)
_root_logger.addHandler(ch)
cls._unexecuted_configure = False
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