使用 python 日志记录为每天创建新的日志文件

Question

我的 python 代码可以很好地创建一个日志文件，其中包含执行代码的名称和日期 -

例如-

我今天运行代码它会创建日志文件 - logfile_2020-01-15.log

我明天运行代码，它将创建日志文件 - logfile_2020-01-16.log 等等。

现在的问题是，如果我的代码从今天开始执行并持续运行 8 天。它应该创建 8 个日志文件 - 每天 1 个文件：logfile_2020-01-15.log to logfile_2020-01-23.log

但这并没有发生。启动代码时，它会继续登录同一文件：logfile_2020-01-15.log。

谁能帮我修改代码-

import datetime
import logging
import schedule
class Workflow:    

    def setupLoggingToFile():
        logFilePath = "C:\ExceptionLogFiles\"
        logdate = datetime.datetime.now().strftime('%Y-%m-%d')
        logging.basicConfig(
            format='%(asctime)s %(name)-12s %(levelname)-8s %(message)s',
            datefmt='%m-%d-%y %H:%M:%S',
            level=logging.DEBUG,
            handlers=[RotatingFileHandler(logFilePath + "logfile_"+logdate+".log",maxBytes=10485760, backupCount=100)])   

    def StartWorkflow(self):
        try:
            print("New Cron Cycle Started..")
        except Exception:
            logging.exception("Something went wrong.", exc_info=True)

    def StartCron(self):
        try:
            schedule.every(5).seconds.do(self.StartWorkflow)
            while 1:
                schedule.run_pending()
                time.sleep(1)
        except Exception:
            logging.debug("CRON was unable to start. Something Wrong in StartCron function.")
            logging.exception("CRON was unable to start. Something Wrong in StartCron function.", exc_info=True)


A = Workflow()
A.StartCron()

Answer 1

我会稍微清理一下代码并以这种方式重新编写它。新日志会轮换并在文件末尾附加日期/时间。

>>> def logSetup ():
...    logger = logging.getLogger('testlog')
...    logger.setLevel(logging.DEBUG)
...    formatter = logging.Formatter(fmt='%(asctime)s %(name)-12s %(levelname)-8s %(message)s',
...                                  datefmt='%m-%d-%y %H:%M:%S')
...    fh = TimedRotatingFileHandler('/Documents/projects/python/testlog.log', when='S', interval=5)
...    fh.setFormatter(formatter)
...    logger.addHandler(fh)
...    return logger

在您的情况下，您需要将以下行更改为：

fh = TimedRotatingFileHandler('/Documents/projects/python/testlog.log', when='midnight')

写入日志文件并模拟日志每 5 秒轮换一次。

>>> for i in range (20):
...    logger.debug('%d Writing some logs' % i)
...    sleep (1)
...

结果变成：

$ cat testlog.log.2020-01-15_18-35-01
01-15-20 18:36:24 testlog      DEBUG    0 Writing some logs
01-15-20 18:36:25 testlog      DEBUG    1 Writing some logs
01-15-20 18:36:26 testlog      DEBUG    2 Writing some logs
01-15-20 18:36:27 testlog      DEBUG    3 Writing some logs
01-15-20 18:36:28 testlog      DEBUG    4 Writing some logs
$ cat testlog.log.2020-01-15_18-36-24
01-15-20 18:36:29 testlog      DEBUG    5 Writing some logs
01-15-20 18:36:30 testlog      DEBUG    6 Writing some logs
01-15-20 18:36:31 testlog      DEBUG    7 Writing some logs
01-15-20 18:36:32 testlog      DEBUG    8 Writing some logs
01-15-20 18:36:33 testlog      DEBUG    9 Writing some logs
$ cat testlog.log.2020-01-15_18-36-29
01-15-20 18:36:34 testlog      DEBUG    10 Writing some logs
01-15-20 18:36:35 testlog      DEBUG    11 Writing some logs
01-15-20 18:36:36 testlog      DEBUG    12 Writing some logs
01-15-20 18:36:37 testlog      DEBUG    13 Writing some logs
01-15-20 18:36:38 testlog      DEBUG    14 Writing some logs
$ cat testlog.log.2020-01-15_18-36-34
01-15-20 18:36:39 testlog      DEBUG    15 Writing some logs
01-15-20 18:36:40 testlog      DEBUG    16 Writing some logs
01-15-20 18:36:41 testlog      DEBUG    17 Writing some logs
01-15-20 18:36:42 testlog      DEBUG    18 Writing some logs
01-15-20 18:36:43 testlog      DEBUG    19 Writing some logs
$ cat testlog.log
01-15-20 18:36:39 testlog      DEBUG    15 Writing some logs
01-15-20 18:36:40 testlog      DEBUG    16 Writing some logs
01-15-20 18:36:41 testlog      DEBUG    17 Writing some logs
01-15-20 18:36:42 testlog      DEBUG    18 Writing some logs
01-15-20 18:36:43 testlog      DEBUG    19 Writing some logs