def msg(self, *message, **kw):
        """
        Log a new message.

        The message should be a native string, i.e. bytes on Python 2 and
        Unicode on Python 3. For compatibility with both use the native string
        syntax, for example::

            >>> log.msg('Hello, world.')

        You MUST avoid passing in Unicode on Python 2, and the form::

            >>> log.msg('Hello ', 'world.')

        This form only works (sometimes) by accident.

        Keyword arguments will be converted into items in the event
        dict that is passed to L{ILogObserver} implementations.
        Each implementation, in turn, can define keys that are used
        by it specifically, in addition to common keys listed at
        L{ILogObserver.__call__}.

        For example, to set the C{system} parameter while logging
        a message::

        >>> log.msg('Started', system='Foo')

        """
        actualEventDict = (context.get(ILogContext) or {}).copy()
        actualEventDict.update(kw)
        actualEventDict['message'] = message
        actualEventDict['time'] = time.time()
        if "isError" not in actualEventDict:
            actualEventDict["isError"] = 0

        _publishNew(self._publishPublisher, actualEventDict, textFromEventDict)

        Log a new message.

        The message should be a native string, i.e. bytes on Python 2 and
        Unicode on Python 3. For compatibility with both use the native string
        syntax, for example::

            >>> log.msg('Hello, world.')

        You MUST avoid passing in Unicode on Python 2, and the form::

            >>> log.msg('Hello ', 'world.')

        This form only works (sometimes) by accident.

        Keyword arguments will be converted into items in the event
        dict that is passed to L{ILogObserver} implementations.
        Each implementation, in turn, can define keys that are used
        by it specifically, in addition to common keys listed at
        L{ILogObserver.__call__}.

        For example, to set the C{system} parameter while logging
        a message::

        >>> log.msg('Started', system='Foo')

        
stackoverflow/venv/lib/python3.6/site-packages/twisted/python/log.py