为什么训练不支持predict_with_generate，有什么原因吗？ 需要计算metrics

[jinwik]

Reminder

• [X] I have read the README and searched the existing issues.

System Info

if training_args.do_train and training_args.predict_with_generate:
    raise ValueError("`predict_with_generate` cannot be set as True while training.")

compute_metrics=ComputeMetrics(tokenizer) if training_args.predict_with_generate else None,

Reproduction

无

Expected behavior

No response

Others

No response

[jinec]

@hiyouga 为啥啊？