Question

我需要一种方法让python记录器不记录ERROR或更高版本。需要它只记录少于ERROR。

import logging
from logging import StreamHandler

def get_log_formatter():
    datefmt = '%b %d %y %H:%M:%S'
    formatter = logging.Formatter('%(asctime)s [%(module)s:%(levelname)s] %(message)s',
                          datefmt=datefmt)
    return formatter

class MyHandler(StreamHandler):
    def __init__(self, max_level, *args, **kwargs):
        super(MyHandler, self).__init__(*args, **kwargs)
        self.max_level = max_level
    def emit(self, record):
        if record.levelno >= self.max_level:
            return
        return super(MyHandler, self).emit(record)

handl = MyHandler(logging.ERROR)
handl.setLevel(logging.INFO)
handl.setFormatter(get_log_formatter())
logger = logging.getLogger("testing_logger")
logger.addHandler(handl)
logger.setLevel(logging.INFO)

这似乎有效，但它有意义吗？有没有更好的方法来过滤掉日志？

In [3]: logger_num = 0

In [4]: logger = remake()

In [5]: logger.info("Why")
May 16 01 16:50:10 [<ipython-input-5-c350362291ad>:INFO] Why

In [6]: logger.warn("Why")
May 16 01 16:50:13 [<ipython-input-6-56809439d5a4>:WARNING] Why

In [7]: logger.error("Why")

In [8]:

Answer 1

回顾你的解决方案是你必须继承你想要使用的每个处理程序。

上下文过滤器的意图更清晰：

class MaxFilter:
    def __init__(max_level):
        self.max_level = max_level

    def filter(self, record):
        if record.levelno < self.max_level:
            return True

并且可以应用于任何处理程序：

any_concrete_handler.addFilter(MaxFilter(logging.INFO))

Python：日志处理程序只有日志级别日志小于ERROR

1 个答案: