decorator needs access to variables where it is used.

[Antoon Pardon]

I have some logging utilities so that when I write library code, I just use the following.

from logutil import Logger

log = Logger(__name__)

And from then on I just use log, to do the logging of that module.

But now I would like to write a decorator trace, so that a decorated
function would log, its arguments and result.

Something like:

def trace(func):

    def wrapper(*args):
        log(DEBUG, "=> %s%s" % (func.__name__, args))
        result = func(*args)
        log(DEBUG, "%s => %s" (func.__name__, result))

    return wrapper

The problem is that with this decorater, the log function
used, will be the log function defined where the decorator
is written and I would prefer it to use the log function
where it is used, so that it uses the same log function
as the function it decorates.