学习网站：https://www.cnblogs.com/yuanchenqi/articles/5732581.html
logging 模块：
# _author: lily # _date: 2019/1/14 import logging # logging.debug('debug message') # logging.info('info message') # logging.error('error message') # logging.warning('warning message') # logging.critical('critical message') # 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') # # #Mon,14 Jan 2019 23:23:11 learn_of_logging_module.py[line:17] DEBUG debug message # logging.debug('debug message') # logging.info('info message') # logging.error('error message') # logging.warning('warning message') # logging.critical('critical message') logger = logging.getLogger() # 创建一个handler，用于写入日志文件 fh = logging.FileHandler('test.log') # 文件对象 # 在创建一个handler，用于输出到控制台 ch = logging.StreamHandler() # 屏幕对象 formatter = logging.Formatter('%(asctime)s - %(name)s - %(levelname)s - %(message)s') fh.setFormatter(formatter) ch.setFormatter(formatter) logger.addHandler(fh) logger.addHandler(ch) logger.setLevel(logging.DEBUG) logger.debug('debug message') logger.info('info message') logger.warning('warning message') logger.error('error message') logger.critical('critical message')