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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 flush(self):
 """ Flush the buffer, if applicable. """

        if self.__buffer.tell() > 0:
            # Write the buffer to log
            # noinspection PyProtectedMember
            self.__logger._log(level=self.__log_level, msg=self.__buffer.getvalue().strip(),
                               record_filter=StdErrWrapper.__filter_record)
            # Remove the old buffer
            self.__buffer.truncate(0)
            self.__buffer.seek(0)