【python】【内置模块】【九】【logging】

17 logging

变量/函数	含义	样例
FileHandler()	创建一个用来记录日志的文件句柄	import logging import sys import re logger = logging.getLogger('LoggerName') formatter = logging.Formatter('%(asctime)s %(name)s %(levelname)-8s: %(message)s') file_handler = logging.FileHandler('test.log') file_handler.setFormatter(formatter) console_handler = logging.StreamHandler(sys.stdout) console_handler.formatter = formatter console_filter = logging.Filter() console_filter.filter = lambda record: re.search('error', record.getMessage()) is None console_handler.addFilter(console_filter) logger.addHandler(file_handler) logger.addHandler(console_handler) logger.setLevel(logging.INFO) logger.debug('this is debug.') logger.info('this is info') logger.warning('this is %s', 'warning') logger.error('this is %s' % 'error') logger.critical('this is {}'.format('critical')) output: 2018-03-10 22:40:43,025 LoggerName INFO : this is info 2018-03-10 22:40:43,026 LoggerName WARNING : this is warning 2018-03-10 22:40:43,026 LoggerName CRITICAL: this is critical
Formatter()	创建日志的格式化字符串
Handler	为FileHandler、StreamHandler的父类
LogRecord	日志数据对象，通过getMessage()获取日志数据
Logger	日志对象	>>> type(logging.getLogger('test')) <class 'logging.Logger'>
LoggerAdapter	自定义一个日志对象，自己实现process等函数
StreamHandler	流句柄
addLevelName()	改变level的名字	>>> logging.addLevelName(logging.DEBUG, 'mydebug') >>> logging.getLevelName(logging.DEBUG) 'mydebug'
getLevelName()	获取level的名字	>>> logging.getLevelName(logging.ERROR) 'ERROR'
getLogger()	获取一个日志对象	>>> type(logging.getLogger('test')) <class 'logging.Logger'>
getLoggerClass()	获取日志对象
makeLogRecord()	创建一条日志
setLoggerClass	设置日志对象