Python -日志模块使用

朱雀 2023-07-05 13:12 128阅读 0赞

## 简介 ##

使用的python的日志模块logging用于打印日志。

## 自定义工具类 ##

# encoding: utf-8 
    """ @File : logger.py @Author : 灵枢 @Time : 2020/2/12 10:55 AM @Desc : """
    
    # -*- coding:utf-8 -*-
    import logging
    
    class Logger:
        def __init__(self,loggername):
    
            # Get logger
            self.logger = logging.getLogger(loggername)
            self.logger.setLevel(logging.DEBUG)  # set log level
    
            # Create a handler, write log to a file
            log_path = "logs/"  # log file path
            logname = log_path + 'out.log'  # log file name
            fh = logging.FileHandler(logname,encoding = 'utf-8')
            fh.setLevel(logging.DEBUG)
    
            # Create a handler write log to console
            ch = logging.StreamHandler()
            ch.setLevel(logging.DEBUG)
    
            # Define the output format of the handler
            formatter = logging.Formatter('%(asctime)s-%(name)s-%(levelname)s: %(message)s')
            fh.setFormatter(formatter)
            ch.setFormatter(formatter)
    
            # Add handler to logger
            self.logger.addHandler(fh)
            self.logger.addHandler(ch)
    
        def get_logger(self):
            """Define a function to get logger instance"""
            return self.logger
    
    if __name__ == '__main__':
        logger = Logger("gcui").get_logger()
        logger.info("testing-info: %s", '111')
        logger.debug("testing-DEBUG")

自定义日志工具类，方便以后调用，该工具类提供一个get\_logger方法，返回logger实例。  
调用looger打印日志时，会同时在控制台输出和写入到日志文件（本示例的路径为 /logs/out.log）。

## 调用测试 ##

运行main方法  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2dhbGVuMjAxNg_size_16_color_FFFFFF_t_70]

控制台输出为：  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2dhbGVuMjAxNg_size_16_color_FFFFFF_t_70 1]

日志文件内容如下：  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2dhbGVuMjAxNg_size_16_color_FFFFFF_t_70 2]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2dhbGVuMjAxNg_size_16_color_FFFFFF_t_70]: https://img-blog.csdnimg.cn/20200215101240200.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2dhbGVuMjAxNg==,size_16,color_FFFFFF,t_70
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2dhbGVuMjAxNg_size_16_color_FFFFFF_t_70 1]: https://img-blog.csdnimg.cn/20200215101332664.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2dhbGVuMjAxNg==,size_16,color_FFFFFF,t_70
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2dhbGVuMjAxNg_size_16_color_FFFFFF_t_70 2]: https://img-blog.csdnimg.cn/20200215101423966.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2dhbGVuMjAxNg==,size_16,color_FFFFFF,t_70