代码就是demo中的例子,例子中SparseFeat的vocabulary_size大小设置为最大值+1 ``` fixlen_feature_columns = [SparseFeat(feat, data[feat].max() + 1,embedding_dim=4) for feat in sparse_features] ``` 当我将其改为1时代码仍能成功运行 ``` fixlen_feature_columns = [SparseFeat(feat, 1,embedding_dim=4) for feat in sparse_features] ```  而当我禁用gpu,使用cpu训练模型时tensorflow则会提示我越界错误 