python通过TimedRotatingFileHandler按时间切割日志

通过TimedRotatingFileHandler按时间切割日志

---

import time
import logging
import os
from logging import handlers


def _logging(**kwargs):
    level = kwargs.pop('level', None)
    filename = kwargs.pop('filename', None)
    datefmt = kwargs.pop('datefmt', None)
    format = kwargs.pop('format', None)
    if level is None:
        level = logging.DEBUG
    if filename is None:
        filename = 'default.log'
    if datefmt is None:
        datefmt = '%Y-%m-%d %H:%M:%S'
    if format is None:
        format = '%(asctime)s [%(module)s] %(levelname)s [%(lineno)d] %(message)s'

    log = logging.getLogger(filename)
    format_str = logging.Formatter(format, datefmt)
    # backupCount 保存日志的数量，过期自动删除
    # when 按什么日期格式切分(这里方便测试使用的秒)
    th = handlers.TimedRotatingFileHandler(filename=filename, when='S', backupCount=3, encoding='utf-8')
    th.setFormatter(format_str)
    th.setLevel(logging.INFO)
    log.addHandler(th)
    log.setLevel(level)
    return log

os.makedirs("./logs", exist_ok=True)
logger = _logging(filename='./logs/default.log')



if __name__ == '__main__':
    while True:
        time.sleep(0.1)
        logger.info('哈哈哈')

结果如下：

# 在上述代码中加入
def namer(filename):
    return filename.split('default.')
th.namer = namer
# 设置为S，默认的suffix为 Y-%m-%d_%H-%M-%S
th.suffix = "%Y-%m-%d_%H-%M-%S.log"

# 为了看的更视觉效果，可以显示在控制台答应
cmd = logging.StreamHandler()
cmd.setFormatter(format_str)
cmd.setLevel(level)
log.addHandler(cmd)

运行结果：

    def getFilesToDelete(self):
        """
        Determine the files to delete when rolling over.

        More specific than the earlier method, which just used glob.glob().
        """
        dirName, baseName = os.path.split(self.baseFilename)
        fileNames = os.listdir(dirName)
        result = []
        prefix = baseName + "."
        plen = len(prefix)
        for fileName in fileNames:
            if fileName[:plen] == prefix:
                suffix = fileName[plen:]
                if self.extMatch.match(suffix):
                    result.append(os.path.join(dirName, fileName))
        if len(result) < self.backupCount:
            result = []
        else:
            result.sort()
            result = result[:len(result) - self.backupCount]
        return result

import logging
import os
from logging import handlers


def _logging(**kwargs):
    level = kwargs.pop('level', None)
    filename = kwargs.pop('filename', None)
    datefmt = kwargs.pop('datefmt', None)
    format = kwargs.pop('format', None)
    if level is None:
        level = logging.DEBUG
    if filename is None:
        filename = 'default.log'
    if datefmt is None:
        datefmt = '%Y-%m-%d %H:%M:%S'
    if format is None:
        format = '%(asctime)s [%(module)s] %(levelname)s [%(lineno)d] %(message)s'

    log = logging.getLogger(filename)
    format_str = logging.Formatter(format, datefmt)

    def namer(filename):
        return filename.split('default.')[1]

    # cmd = logging.StreamHandler()
    # cmd.setFormatter(format_str)
    # cmd.setLevel(level)
    # log.addHandler(cmd)

    os.makedirs("./debug/logs", exist_ok=True)
    th_debug = handlers.TimedRotatingFileHandler(filename="./debug/" + filename, when='D', backupCount=3,
                                                 encoding='utf-8')
    # th_debug.namer = namer
    th_debug.suffix = "%Y-%m-%d.log"
    th_debug.setFormatter(format_str)
    th_debug.setLevel(logging.DEBUG)
    log.addHandler(th_debug)

    th = handlers.TimedRotatingFileHandler(filename=filename, when='D', backupCount=3, encoding='utf-8')
    # th.namer = namer
    th.suffix = "%Y-%m-%d.log"
    th.setFormatter(format_str)
    th.setLevel(logging.INFO)
    log.addHandler(th)
    log.setLevel(level)
    return log


os.makedirs('./logs', exist_ok=True)
logger = _logging(filename='./logs/default')