logging module: problem with custom handlers

[Peter Otten]

Andreas Jung wrote:

> I am trying to write a custom logger with a custom handler:
 
> Now I want to configure this logger through a configuration
> file. How can I refer to the new handler in the configuration file?
> Something like "class=MyHandler" did not work.
> 
> Any ideas?

The handler's class is evaluatated like so in module logging.config:

klass = eval(klass, vars(logging))

For this to succeed you could do something like:


import logging
import logging.config

class MyHandler(logging.StreamHandler):
  pass

logging.MyHandler = MyHandler

logging.config.fileConfig("test.cfg")
lgr = logging.getLogger("test")

lgr.info("Hello world")


where the relevant handler section has the line

class=MyHandler

I do not know if there is an "official" way to achieve the same, but then, 
why would you build your own Handler in the first place?

Peter