python 的日志相关应用

python日志主要用logging模块;

示例代码如下：

#coding:utf-8
import  logging

class logger():
    ‘‘‘
    %(asctime)s %(filename)s[line:%(lineno)d] %(levelname)s %(message)s
    ‘‘‘
    format_dict = {
       1 : logging.Formatter(‘%(asctime)s - %(filename)s-[line:%(lineno)d]-%(name)s - %(levelname)s - %(message)s‘),
       2 : logging.Formatter(‘%(asctime)s - %(name)s - %(levelname)s - %(message)s‘),
       3 : logging.Formatter(‘%(asctime)s - %(name)s - %(levelname)s - %(message)s‘),
       4 : logging.Formatter(‘%(asctime)s - %(name)s - %(levelname)s - %(message)s‘),
       5 : logging.Formatter(‘%(asctime)s - %(name)s - %(levelname)s - %(message)s‘)
    }

    def __init__(self, logname, loglevel, logger):
        ‘‘‘
           指定保存日志的文件路径，日志级别，以及调用文件
           将日志存入到指定的文件中
        ‘‘‘

        # 创建一个logger
        self.logger = logging.getLogger(logger)
        self.logger.setLevel(logging.DEBUG)

        # 创建一个handler，用于写入日志文件
        fh = logging.FileHandler(logname)
        fh.setLevel(logging.DEBUG)

        # 再创建一个handler，用于输出到控制台
        ch = logging.StreamHandler()
        ch.setLevel(logging.DEBUG)

        # 定义handler的输出格式
        #formatter = logging.Formatter(‘%(asctime)s - %(name)s - %(levelname)s - %(message)s‘)
        formatter =self.format_dict[int(loglevel)]
        fh.setFormatter(formatter)
        ch.setFormatter(formatter)

        # 给logger添加handler
        self.logger.addHandler(fh)
        self.logger.addHandler(ch)

    def __init__(self,loglevel, logger):
        ‘‘‘
           指定保存日志的文件路径，日志级别，以及调用文件
           将日志存入到指定的文件中
        ‘‘‘

        # 创建一个logger
        self.logger = logging.getLogger(logger)
        self.logger.setLevel(logging.DEBUG)

        # 再创建一个handler，用于输出到控制台
        ch = logging.StreamHandler()
        ch.setLevel(logging.DEBUG)

        # 定义handler的输出格式
        #formatter = logging.Formatter(‘%(asctime)s - %(name)s - %(levelname)s - %(message)s‘)
        formatter =self.format_dict[int(loglevel)]
        ch.setFormatter(formatter)

        # 给logger添加handler
        self.logger.addHandler(ch)

    def getlog(self):
        return self.logger

if __name__ == ‘__main__‘:
    logger = logger(loglevel=2, logger="log").getlog()
    logger.info("we are the world!!!!")