无法使用 TimedRotatingFileHandler 以自定义时间戳格式命名日志文件

Question

是否可以使用

TimedRotatingFileHandler

创建具有自定义日期格式的日志文件？

import logging
from logging.handlers import TimedRotatingFileHandler
import os
from datetime import datetime
import time

logger = logging.getLogger('my_logger')
logger.setLevel(logging.DEBUG)

log_dir = 'logs'
log_file = os.path.join(log_dir, datetime.now().strftime('%Y%m%d-%H%M%S') + f'_.log')

handler = TimedRotatingFileHandler(log_file, when='s', interval=1, backupCount=0)
handler.setFormatter(logging.Formatter('%(asctime)s - %(levelname)s - %(message)s'))
logger.addHandler(handler)

i = 0
while True:
    logger.info(i)
    print(i)
    time.sleep(1)
    i += 1

产品

20230810-100547_.log.2023-08-10_10-05-47
20230810-100547_.log.2023-08-10_10-05-48
20230810-100547_.log

而不是

20230810-100547_.log
20230810-100548_.log
20230810-100549_.log

午夜后是否需要重置处理程序（是否可能）？看起来不太优雅。

日志处理程序中似乎有一个 namer 属性

Answer 1

有

rotation_filename

 方法，您可以将其分配给 namer 函数。它将在轮换期间更改日志文件的名称。工作代码应该如下所示：

import logging
from logging.handlers import TimedRotatingFileHandler
import os
from datetime import datetime
import time

def namer(self):
    now = datetime.now()
    log_dir = './logs'
    return os.path.join(log_dir, datetime.now().strftime('%Y%m%d-%H%M%S') + f'_.log')

logger = logging.getLogger('my_logger')
logger.setLevel(logging.DEBUG)

log_dir = './logs'
log_file = os.path.join(log_dir, datetime.now().strftime('%Y%m%d-%H%M%S') + f'_.log')

handler = TimedRotatingFileHandler(log_file, when='s', interval=1, backupCount=0)
handler.rotation_filename = namer
handler.setFormatter(logging.Formatter('%(asctime)s - %(levelname)s - %(message)s'))
logger.addHandler(handler)


i = 0
while True:
    logger.info(i)
    print(i)
    time.sleep(1)
    i += 1