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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:
 async def explain(self, *args, analyze=False):
 """Return the execution plan of the statement. :param args: Query arguments. :param analyze: If ``True``, the statement will be executed and the run time statitics added to the return value. :return: An object representing the execution plan. This value is actually a deserialized JSON output of the SQL ``EXPLAIN`` command. """

        query = 'EXPLAIN (FORMAT JSON, VERBOSE'
        if analyze:
            query += ', ANALYZE) '
        else:
            query += ') '
        query += self._state.query

        if analyze:
            # From PostgreSQL docs:
            # Important: Keep in mind that the statement is actually
            # executed when the ANALYZE option is used. Although EXPLAIN
            # will discard any output that a SELECT would return, other
            # side effects of the statement will happen as usual. If you
            # wish to use EXPLAIN ANALYZE on an INSERT, UPDATE, DELETE,
            # CREATE TABLE AS, or EXECUTE statement without letting the
            # command affect your data, use this approach:
            #     BEGIN;
            #     EXPLAIN ANALYZE ...;
            #     ROLLBACK;
            tr = self._connection.transaction()
            await tr.start()
            try:
                data = await self._connection.fetchval(query, *args)
            finally:
                await tr.rollback()
        else:
            data = await self._connection.fetchval(query, *args)

        return json.loads(data)