A function logger decorator in Python. It logs the class, function name, argument list and argument values. You can use it to decorate single functions or classes.

logger.py

import logging
import inspect
logging.basicConfig(level=logging.DEBUG)

def log(fn):
    def logger(self=None, *a, **ka):
        cls_name = self.__class__.__name__ if self else ''
        argspec = inspect.getargspec(fn)
        args = {name:a[idx] for idx, name in enumerate(argspec.args[1:])}
        logging.info('Called %s.%s with arguments %s',
                     cls_name,
                     fn.__name__,
                     args)
        if (self):
            return fn(self, *a, **ka)
        return fn(*a, **ka)

    if not inspect.isclass(fn):
        return logger

    cls = fn
    for attr in cls.__dict__:
        if callable(getattr(cls, attr)):
            setattr(cls, attr, log(getattr(cls, attr)))
    return cls