Created by: pengwangucla

For paddle api v2,

The infer is only for a single output:

gen_result=paddle.infer(
    output_layer=beam_gen,
    parameters=parameters,
    input=gen_data, 
    field=['id', 'value'])

Even for multiple fields, what should I do if I want to simultaneously obtain multiple outputs from layer1 and layer2, is it possible to upgrade the function as

gen_result=paddle.infer(
    output_layer=[beam_gen1, beam_gen2],
    parameters=parameters,
    input=gen_data, 
    field=['id', 'value'])

Also set the gen results to be a list.

@reyoung @luotao1