'Writes given message to the log file using the specified log level.
The message to log and the log level to use are defined using
``message`` and ``level`` arguments, respectively.
If no log level is given, the default level given during `library
importing` is used.'

def log_message(self, message, level=None):

    level = (self._verify_level(level) if level else self.default_level)
    print ('*%s*    %s' % (level, message))
