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README.md

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119 lines (91 loc) · 3.48 KB

Xiang Wang @ 2018-09-04 18:49:59

example

  • 基础

    import logging

    logging.basicConfig( level=logging.INFO, format='%(asctime)s %(filename)s[line:%(lineno)d] %(levelname)s %(message)s', datefmt='%Y-%m-%d %H:%M:%S', filename='./log/test.log', filemode='a')

    log = logging.getLogger()

    ch = logging.StreamHandler() ch.setLevel(logging.INFO) formatter = logging.Formatter('%(asctime)s %(filename)s[line:%(lineno)d] %(levelname)s %(message)s') ch.setFormatter(formatter)

    log.addHandler(ch)

  • 保存到文件的同时，输入的终端

    import logging logger = logging.getLogger('simple_example') logger.setLevel(logging.DEBUG)

    ch = logging.StreamHandler() ch.setLevel(logging.INFO) formatter = logging.Formatter('%(asctime)s - %(name)s - %(levelname)s - %(message)s') ch.setFormatter(formatter)

    fh = logging.FileHandler(filename='log.log') fh.setLevel(logging.WARNING) f_formatter = logging.Formatter('%(asctime)s - %(levelname)s - %(message)s') fh.setFormatter(f_formatter)

    logger.addHandler(ch) logger.addHandler(fh)

    logger.info("info message") logger.warn("warn message")

  • 添加过滤器,只记录info,不记录warning

    import logging logger = logging.getLogger('test_filter') logger.setLevel(logging.DEBUG) ch = logging.StreamHandler() ch.setLevel(logging.INFO) ch.setFormatter( logging.Formatter('%(user)s %(message)s') ) class RamwinFilter(logging.Filter): def filter(self, record): record.user = 'ramwin' if record.levelname == 'WARNING': return False print(record.levelname) return True f = RamwinFilter() logger.addHandler(ch) logger.addFilter(f) logger.info("info") logger.warning("warning")

Exceptions raised during logging

测试

logging.Logger

  • debug(msg, *args, **kwargs)
  • log(lvl, msg, *args, **kwargs) lvl: 必须是整数 用指定的lvl等级去添加一个日志, 只要这个lvl大于等于20, 就会出发logging.INFO

logging.handlers

官网

StreamHandler

FileHandler

class logging.FileHandler(filename, mode='a', encoding=None, delay=False)

MemoryHandler

测试 MemoryHandler继承了BufferingHandler, 可以用来临时记录日志，一旦日志太多(超过了capacity),或者等级太高(达到了flushLevel), 就会记录到(target) 如果需要抛弃刚才的日志，可以调用log.handelrs[0].close()或者log.removeHandler(memory_handler)

class logging.handlers.MemoryHandler(capacity, flushLevel=ERROR, target=None)

其他

  • NullHandler
  • WatchedFileHadnler
  • BaseRotatingHandler
  • RotatingFileHandler
  • TimedRotatingFileHandler
  • SocketHandler
  • DatagramHandler
  • SysLogHandler
  • NTEventLogHandler
  • SMTPHandler
  • HTTPHandler
  • QueueHandler
  • QueueListener