案例

# -*- coding: utf-8 -*-
import time
import sys
import logging
from logging import handlers


class Log(object):

    @classmethod
    def get_logger(cls, filename, level=logging.DEBUG):
        # 创建日志对象
        log = logging.getLogger(filename)
        # 设置日志级别
        log.setLevel(level)
        # 日志输出格式
        fmt = logging.Formatter('%(asctime)s %(thread)d %(filename)s[line:%(lineno)d] - %(levelname)s: %(message)s')
        # 数据流
        stream_handler = logging.StreamHandler(sys.stdout)
        stream_handler.setFormatter(fmt)
        # 输出到文件
        # 日志文件按天进行保存，每天一个日志文件
        file_handler = handlers.TimedRotatingFileHandler(filename=filename, when='D', backupCount=1, encoding='utf-8')
        # 按照大小自动分割日志文件，一旦达到指定的大小重新生成文件
        # file_handler = handlers.RotatingFileHandler(filename=filename,
        #                                             maxBytes=1 * 1024 * 1024 * 1024,
        #                                             backupCount=1,
        #                                             encoding='utf-8')
        file_handler.setFormatter(fmt)
        log.addHandler(stream_handler)
        log.addHandler(file_handler)
        return log


logger = Log.get_logger('./api_{}.log'.format(time.strftime('%Y-%m-%d', time.localtime()), level=logging.INFO))