“319742c641d32d64113655c0b0129f10b7ca42b6”上不存在“doc/api/predict/src/predict_sample.py”
* a draft of trainer.test() * polish trainer.test() * polish trainer.test() * update code format * update * polish code * polish code * polish code * Make trainer.test follow the rule of returning [loss, metric, metric, ..]