Python LzmaRotatingFileHandler: Simple extension of RotatingFileHandler that using LZMA compression after rolling a log file

lzmalogger.py

import logging.handlers
import lzma
import os
"""
This can be done a few different ways. You can also implement it as a standalone
function, instnatiate a standard logging.handlers.RotatingFileHandler, and then
assign your own rotator() function to to the `rotator` attribute of the instance

I think it's more convenient encapsulating it like this, though
-AG
"""


MAX_LOG_SIZE = 1 << 24  # 24MB
MAX_LOG_BACKUP = 10  # Keep the 10 most recent

class LzmaRotatingFileHandler(logging.handlers.RotatingFileHandler):
    """Rotating log handler that uses LZMA to compress when rolling over the log file

    Usage is identical to logging.handlers.RotatingFileHandler:
        file_handler = LzmaRotatingFileHandler(outfile, maxBytes=MAX_LOG_SIZE, backupCount=MAX_LOG_BACKUP)
        file_handler.setLevel(file_log_level)
        file_formatter = logging.Formatter('%(levelname)s %(funcName)s():%(lineno)d\t%(message)s')
        file_handler.setFormatter(file_formatter)
        logger.addHandler(file_handler)

    """
    def __init__(self, *args, **kwargs):
        super(LzmaRotatingFileHandler, self).__init__(*args, **kwargs)
        self.rotator = self._rotator

    @staticmethod
    def _rotator(source, dest):
        os.rename(source, dest)
        with open(dest, 'rb') as infd, lzma.open("%s.lzma" % dest, mode='wb') as outfd:
            outfd.writelines(infd)
        os.remove(dest)