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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 _conditional_exits(self, block_addr):
 """ Return a list of conditional statement exits with respect to a basic block. :param block_addr: The address of the basic block. :return: A list of statement IDs. """


        vex_block = self.project.factory.block(block_addr).vex
        lst = [ ]

        for i, stmt in enumerate(vex_block.statements):
            if isinstance(stmt, pyvex.IRStmt.Exit):
                lst.append(i)

        return lst