importosimportlraslrimporttensorflowastffrompyspark.sql.functionsimportstddevfromtensorflow.kerasimportdatasetsos.environ['TF_CPP_MIN_LOG_LEVEL']='2'#只打印error的信息(x,y),_=datasets.mnist.load_data()#x:[60k,28,28]#y:[60k]x=tf.convert_to_tensor(x,dtype=tf.float32)/255#使x的值从0~255降到0~1y=tf.convert_to_tenso