Overwrite “funcName” in logging

I have a utility method which does some logging.

I would like to see the calling method name in the logs, and not the name of the utility method.

For testing I tried this (later I want to get "bar" from the caller via the inspect module).

def helper(...):
    logger.info('foo', extra=dict(funcName='bar'))

But this does not work:

  File "/usr/lib/python2.7/logging/__init__.py", line 1167, in info
    self._log(INFO, msg, args, **kwargs)
  File "/usr/lib/python2.7/logging/__init__.py", line 1285, in _log
    record = self.makeRecord(self.name, level, fn, lno, msg, args, exc_info, func, extra)
  File "/usr/lib/python2.7/logging/__init__.py", line 1263, in makeRecord
    raise KeyError("Attempt to overwrite %r in LogRecord" % key)
KeyError: "Attempt to overwrite 'funcName' in LogRecord"

Here is the output (if I don't try to pass in "extra"):

2017-01-30 15:00:24 loghelper.helper

I would like to see the caller:

2017-01-30 15:00:24 calling_module.calling_method

How could this be done?

Update

The method-name and other data gets outputted via a logging Formater:

logging.Formatter('%(asctime)s %(name)s.%(funcName)s +%(lineno)s: %(levelname)-8s [%(process)d] %(message)s',
                                   '%Y-%m-%d %H:%M:%S')

You can add an intermediate method which will further call the logging method.

def autolog(message):
    "Automatically log the current function details."
    import inspect, logging
    # Get the previous frame in the stack, otherwise it would
    # be this function!!!
    func = inspect.currentframe().f_back.f_code
    # Dump the message + the name of this function to the log.
    logging.debug("%s: %s in %s:%i" % (
        message, 
        func.co_name, 
        func.co_filename, 
        func.co_firstlineno
    ))