Python logging: Why is __init__ called twice?

Question

I am trying to use python logging with a config file and an own handler. This works to some degree. What really puzzle me is __init__ being called twice and _

Answer 1

You are missing an if __name__ == "__main__": guard around your logging configuration code. It is getting executed a second time when logging imports your test1 module to find the class reference.

Alternatively, use the name __main__.Test1TimedRotatingFileHandler in the config file, or else put the configuration code and the handler class in different files.