使用日志记录的 TimedRotatingFileHandler 创建.log 文件

Question

I would expect the TimedRotatingFileHandler to create.log files, but instead it creates files without extension. Is there any way I can set up the handler to generate log files?

What I want in a nutshell: file_name.2019-10-09.log , instead of file_name.log.2019-10-09 .

Answer 1

From the class' documentation (emphasis mine):

The system will save old log files by appending extensions to the filename . The extensions are date-and-time based, using the strftime format %Y-%m-%d_%H-%M-%S or a leading portion thereof, depending on the rollover interval.

This, plus the implementation of the doRollover function show that the class will simply append the time to whatever filename the old log file has. There seems to be no way for you to force it to keep the same file extension.

Answer 2

Here my code example, can ignore extra arguments. I have in a Singleton class

from logging.handlers import RotatingFileHandler


rhandler = RotatingFileHandler("your_desired_FILENAME_logger.out" ,
                                       mode="a+",
                                       maxBytes=10*1024*1024,
                                       backupCount=5)