Python set filemode in logging configuration file

Question

I am trying to config the loggers in a text configuration file using Python. Here is partial content:

[logger_root]
handlers=result
level=NOTSET

[handler_result]
class=handlers.TimedRotatingFileHandler
interval=midnight
backupCount=5
formatter=simple
level=DEBUG
args=('result_log.txt')

I would like to rewrite the log file every time I run the system. But not know how to set it in the file. I try this but fails:

args=('result_log.txt',filemode='w')

A lot of articles talk about how to set it from the Python code. But I would like to set it in the file. How to do it? Thanks.

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Edit: I can write some info into the log file 'result_log.txt' by:

result_logger = logging.getLogger('result')
result_logger.debug("info to write")

But I can only "append" to the file. I would like to rewrite the file every time i run.

Answer 1

You can use either of the two methods:-

1. Backup the old log file and create a new file using RotatingFileHandler

2. Replace the file itself (provided you don't need the old log anymore). You can have a look at this for the steps

Hope this helps.

Answer 2

Instead of using the logger module, would you be able to use the below instead?

open("result_log.txt", "w").write("result")

I understand this would be a workaround for now, until someone is able to answer this question better.

Hope this helps :)

Answer 3

In fact, you can set filemode to w from within your configuration file. You just need to remove the explicit argument naming, like so:

args=('result_log.txt','w')