Method _add_feed_ops

python/paddle/base/executor.py:2752–2782

(self, program, feed, feed_var_name)

        return ctx

    def _add_feed_ops(self, program, feed, feed_var_name):
        tmp_program = program.clone()

        global_block = tmp_program.global_block()

        if feed_var_name in global_block.vars:
            feed_var = global_block.var(feed_var_name)
        else:
            feed_var = global_block.create_var(
                name=feed_var_name,
                type=core.VarDesc.VarType.FEED_MINIBATCH,
                persistable=True,
            )

        # prepend feed operators
        if not has_feed_operators(global_block, feed, feed_var_name):
            for i, name in enumerate(feed):
                if global_block.has_var(name):
                    out = global_block.var(name)
                    global_block._prepend_op(
                        type='feed',
                        inputs={'X': [feed_var]},
                        outputs={'Out': [out]},
                        attrs={'col': i},
                    )
                else:
                    warnings.warn(
                        f"The variable {name} is not found in program. It is not declared or is pruned."
                    )

        return tmp_program

    @classmethod
    def _add_fetch_ops(