python 以单例模式封装logging相关api实现日志打印类
by:授客QQ：1033553122
测试环境：
Python版本：Python 2.7
实现功能：
支持自由配置,如下log.conf,
1）可以配置日志文件路径(log_file)；
2）按日志数量配置(backup_count)及单个日志文件的大小(max_bytes_each）,自动化循环切换日志文件；
3）支持日志格式自定义(fmt)；
4）支持日志记录器名称自定义(logger_name)
6）支持控制台日志和文件日志
5) 支持控制台日志级别自定义(log_level_in_console)
6）支持文件日志级别自定义(log_level_in_logfile)
7) 支持控制台和文件日志的各自的开启和关闭(分别为console_log_on, logfile_log_on)
log.conf配置文件
./config/logconfig.conf配置如下：
[LOGGING]
log_file = d:/testlog.txt
max_bytes_each = 3
backup_count = 5
fmt = |(asctime)s |(filename)s[line: |(lineno)d] |(levelname)s: |(message)s
logger_name = test_logger
log_level_in_console = 20
log_level_in_logfile = 10
console_log_on = 1
logfile_log_on = 1
#日志级别：CRITICAL = 50 ERROR = 40 WARNING = 30 INFO = 20 DEBUG = 10 NOTSET = 0
#console_log_on = 1 开启控制台日志，logfile_log_on = 1 开启文件日志
实践代码
#!/usr/bin/env python
# -*- coding:utf-8 -*-
#!/usr/bin/env python
# -*- coding:utf-8 -*-
__author__ = 'shouke'
import logging
from logging.handlers import RotatingFileHandler
import threading
import configparser
class LogSignleton(object):
def __init__(self, log_config):
pass
def __new__(cls, log_config):
mutex=threading.Lock()
mutex.acquire() # 上锁，防止多线程下出问题
if not hasattr(cls, 'instance'):
cls.instance = super(LogSignleton, cls).__new__(cls)
config = configparser.ConfigParser()
config.read(log_config)
cls.instance.log_filename = config.get('LOGGING', 'log_file')
cls.instance.max_bytes_each = int(config.get('LOGGING', 'max_bytes_each'))
cls.instance.backup_count = int(config.get('LOGGING', 'backup_count'))
cls.instance.fmt = config.get('LOGGING', 'fmt')
cls.instance.log_level_in_console = int(config.get('LOGGING', 'log_level_in_console'))
cls.instance.log_level_in_logfile = int(config.get('LOGGING', 'log_level_in_logfile'))
cls.instance.logger_name = config.get('LOGGING', 'logger_name')
cls.instance.console_log_on = int(config.get('LOGGING', 'console_log_on'))
cls.instance.logfile_log_on = int(config.get('LOGGING', 'logfile_log_on'))
cls.instance.logger = logging.getLogger(cls.instance.logger_name)
cls.instance.__config_logger()
mutex.release()
return cls.instance
def get_logger(self):
return self.logger
def __config_logger(self):
# 设置日志格式
fmt = self.fmt.replace('|','%')
formatter = logging.Formatter(fmt)
if self.console_log_on == 1: # 如果开启控制台日志
console = logging.StreamHandler()
#console.setLevel(self.log_level_in_console)
console.setFormatter(formatter)
self.logger.addHandler(console)
self.logger.setLevel(self.log_level_in_console)
if self.logfile_log_on == 1: # 如果开启文件日志
rt_file_handler = RotatingFileHandler(self.log_filename, maxBytes=self.max_bytes_each, backupCount=self.backup_count)
rt_file_handler.setFormatter(formatter)
self.logger.addHandler(rt_file_handler)
self.logger.setLevel(self.log_level_in_logfile)
if __name__ == '__main__':
logsignleton = LogSignleton('./config/logconfig.conf')
logger = logsignleton.get_logger()
#logger = logging.getLogger('test_logger') # 在其它模块中时，可这样获取该日志实例
logger.debug('this is a debug level message')
logger.info('this is info level message')
logger.warning('this is warning level message')
logger.error('this is error level message')
logger.critical('this is critical level message')
注：多次使用相同的name调用getLogger方法返回同一个logger对象，可通过id(obj)进行验证
运行结果：
d:\目录下生成文件如下：
