pytho logging

import logging

logging.basicConfig(level=logging.DEBUG,
                    format='%(asctime)s %(filename)s[line:%(lineno)d] %(levelname)s %(message)s',
                    datefmt='%a, %d %b %Y %H:%M:%S',
                    filename='test.log',
                    filemode='w')


logging.debug('debug message')
logging.info('info message')
logging.warning('warning message')
logging.error('error message')
logging.critical('critical message')

logger = logging.getLogger()
logger.setLevel(logging.INFO)

formatter = logging.Formatter('%(asctime)s - %(name)s - %(levelname)s - %(message)s')

handler = logging.FileHandler("log.txt", mode='w+')
handler.setLevel(logging.ERROR)

ch = logging.StreamHandler()
ch.setLevel(logging.DEBUG)

handler.setFormatter(formatter)
ch.setFormatter(formatter)

logger.addHandler(handler)
logger.addHandler(ch)

logging.debug('debug message')
logging.info('info message')
logging.warning('warning message')
logging.error('error message')
logging.critical('critical message')

① 得到一个记录器
② 设置日志等级
③ 设置日志格式
④ 生成一个handler对象
⑤ 设置handler日志等级
⑥ 日志记录器添加 hanler

问题   logger.setLevel  与 handler.setLevel 区别

https://blog.csdn.net/sunwukong_hadoop/article/details/80092009  Python3 logging详解

 

standard_format = '[%(asctime)s][%(threadName)s:%(thread)d][task_id:%(name)s][%(filename)s:%(lineno)d]' \
                  '[%(levelname)s][%(message)s]' #其中name为getlogger指定的名字

simple_format = '[%(levelname)s][%(asctime)s][%(filename)s:%(lineno)d]%(message)s'

id_simple_format = '[%(levelname)s][%(asctime)s] %(message)s'

logfile_name = "access.log"
logfile_path = logfile_name

LOGGING_DIC = {
    'version': 1,
    'disable_existing_loggers': False,
    'formatters': {
        'standard': {
            'format': standard_format
        },
        'simple': {
            'format': simple_format
        },
    },
    'filters': {},
    'handlers': {
        #打印到终端的日志
        'console': {
            'level': 'DEBUG',
            'class': 'logging.StreamHandler',  # 打印到屏幕
            'formatter': 'standard'
        },
        #打印到文件的日志,收集info及以上的日志
        'default': {
            'level': 'DEBUG',
            'class': 'logging.handlers.RotatingFileHandler',  # 保存到文件
            'formatter': 'standard',
            'filename': logfile_path,  # 日志文件
            'maxBytes': 1024*1024*5,  # 日志大小 5M
            'backupCount': 5,
            'encoding': 'utf-8',  # 日志文件的编码，再也不用担心中文log乱码了
        },
    },
    'loggers': {
        #logging.getLogger(__name__)拿到的logger配置
        '': {
            'handlers': ['default', 'console'],  # 这里把上面定义的两个handler都加上，即log数据既写入文件又打印到屏幕
            'level': 'DEBUG',
            'propagate': True,  # 向上（更高level的logger）传递
        },
    },
}

def log(taskname):
    logging.config.dictConfig(LOGGING_DIC)
    logger = logging.getLogger(taskname)
    return logger