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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def get_subject(self):
 """Generate the subject."""

        level = logging.getLevelName(self.flush_level)
        message = self.current_buffer[0].split("\n")[0]
        message = message.split(']')[-1]
        return '{0} : {1}{2}'.format(level, SOURCE, message)