# 行添加，删除数据 valid_tmp= np.append(valid_tmp, train_tmp[idx],axis=0)# train_tmp[idx]和valid_tmp维数相同 train_tmp= np.delete(train_tmp, idx, axis=0)# 删除train_tmp[idx, :]的数据，idx可以是个list# 列添加删除数据 valid_tmp= np.append(valid_tmp, train_tmp[:, idx],axis=1)# train_tmp[idx]和valid_tmp维数相同 train_tmp= np.delete(train_tmp, idx, axis=1)# 删除train_tmp[:, idx]的数据，idx可以是个list