python logging日志模块

import logging


class LogFilter(logging.Filter):
    """忽略带 db handle 的日志"""
    def filter(self, record):  # 固定写法
        return 'db handle' not in record.getMessage()


# 1.生成 logging 的对象
logger = logging.getLogger('web')
logger.setLevel(logging.DEBUG)

# 2.生成 handler对象
ch = logging.StreamHandler()
fh = logging.FileHandler('web.log')

# 2.1 把 handler对象 绑定到logger
logger.addHandler(ch)
logger.addHandler(fh)

# 3.生成formatter 对象
file_formatter = logging.Formatter('%(asctime)s:%(name)s:%(levelname)s:%(message)s')
console_formatter = logging.Formatter('%(asctime)s-%(name)s-%(message)s')

# 3.1 把formatter 对象 绑定handler对象
ch.setFormatter(console_formatter)
fh.setFormatter(file_formatter)

logger.debug('test bug')
logger.error('test error')