Python日志记录模块:当我运行脚本时，记录器会越来越多地重复这条消息

import logging

class DuplicateFilter(logging.Filter):
    def __init__(self):
        self.record_dict = {}

    def filter(self, record):
        msg = record.msg
        if msg in self.record_dict:
            return False
        self.record_dict[msg] = True
        return True

import logging

# 配置日志记录器
logger = logging.getLogger('my_logger')
logger.setLevel(logging.DEBUG)

# 添加日志过滤器
filter = DuplicateFilter()
logger.addFilter(filter)

# 添加日志处理器，如将日志写入文件
handler = logging.FileHandler('my_log.log')
handler.setLevel(logging.DEBUG)
logger.addHandler(handler)

import logging

# 获取日志记录器实例
logger = logging.getLogger('my_logger')

# 记录不同级别的日志消息
logger.debug('This is a debug message.')
logger.info('This is an info message.')
logger.warning('This is a warning message.')
logger.error('This is an error message.')