from functools import wraps
import logging

def logged(level, name=None, message=None):
"""
Add logging to a function. level is the logging
level, name is the logger name, and message is the
log message. If name and message aren't specified,
they default to the function's module and name.
"""
def decorate(func):
logname = name if name else func.module
log = logging.getLogger(logname)
logmsg = message if message else func.name

    @wraps(func)
    def wrapper(*args, **kwargs):
        log.log(level, logmsg)
        return func(*args, **kwargs)
    return wrapper
return decorate

Example use

@logged(logging.DEBUG)
def add(x, y):
return x + y

@logged(logging.CRITICAL, 'example')
def spam():
print('Spam!'