FATE —— 2.3.2 Homo-NN内置数据集

前言

在FATE-1.10中，提供了表、nlp_标记器和图像三个数据集，以满足表数据、文本数据和图像数据的基本需求

表数据集

TableDataset在table.py下提供，用于处理csv格式的数据，并将自动从数据中解析id和标签。以下是一些源代码，用于了解此数据集类的用法：

class TableDataset(Dataset):

    """
     A Table Dataset, load data from a give csv path, or transform FATE DTable

     Parameters
     ----------
     label_col str, name of label column in csv, if None, will automatically take 'y' or 'label' or 'target' as label
     feature_dtype dtype of feature, supports int, long, float, double
     label_dtype: dtype of label, supports int, long, float, double
     label_shape: list or tuple, the shape of label
     flatten_label: bool, flatten extracted label column or not, default is False
     """

    def __init__(
            self,
            label_col=None,
            feature_dtype='float',
            label_dtype='float',
            label_shape=None,
            flatten_label=False):

标记器数据集

TokenizerDataset是在nlp_tokenizer.py下提供的，它是基于Transformer的BertTokenizer开发的，它可以从csv中读取字符串，同时自动分割文本并将其转换为单词id。

class TokenizerDataset(Dataset):
    """
    A Dataset for some basic NLP Tasks, this dataset will automatically transform raw text into word indices
    using BertTokenizer from transformers library,
    see https://huggingface.co/docs/transformers/model_doc/bert?highlight=berttokenizer for details of BertTokenizer

    Parameters
    ----------
    truncation bool, truncate word sequence to 'text_max_length'
    text_max_length int, max length of word sequences
    tokenizer_name_or_path str, name of bert tokenizer(see transformers official for details) or path to local
                                transformer tokenizer folder
    return_label bool, return label or not, this option is for host dataset, when running hetero-NN
    """

    def __init__(self, truncation=True, text_max_length=128,
                 tokenizer_name_or_path="bert-base-uncased",
                 return_label=True):

图像数据集

ImageDataset在image.py下提供，用于简单处理图像数据。它是基于torchvision的ImageFolder开发的。可以看出，使用了该数据集的参数：

class ImageDataset(Dataset):

    """

    A basic Image Dataset built on pytorch ImageFolder, supports simple image transform
    Given a folder path, ImageDataset will load images from this folder, images in this
    folder need to be organized in a Torch-ImageFolder format, see
    https://pytorch.org/vision/main/generated/torchvision.datasets.ImageFolder.html for details.

    Image name will be automatically taken as the sample id.

    Parameters
    ----------
    center_crop : bool, use center crop transformer
    center_crop_shape: tuple or list
    generate_id_from_file_name: bool, whether to take image name as sample id
    file_suffix: str, default is '.jpg', if generate_id_from_file_name is True, will remove this suffix from file name,
                 result will be the sample id
    return_label: bool, return label or not, this option is for host dataset, when running hetero-NN
    float64: bool, returned image tensors will be transformed to double precision
    label_dtype: str, long, float, or double, the dtype of return label
    """

    def __init__(self, center_crop=False, center_crop_shape=None,
                 generate_id_from_file_name=True, file_suffix='.jpg',
                 return_label=True, float64=False, label_dtype='long'):

使用内置数据集

使用FATE的内置数据集与使用用户自定义数据集完全相同。在这里，我们使用我们的图像数据集和一个具有对流层的新模型来再次解决MNIST手写识别任务，作为示例。

如果您没有MNIST数据集，可以参考前面的教程并下载：Homo-NN自定义数据集

from federatedml.nn.dataset.image import ImageDataset

dataset = ImageDataset()
dataset.load('/mnt/hgfs/mnist/')  # 根据自己得文件位置进行调整

from torch import nn
import torch as t
from torch.nn import functional as F
from pipeline.component.nn.backend.torch.operation import Flatten

# a new model with conv layer, it can work with our ImageDataset
model = t.nn.Sequential(
            nn.Conv2d(in_channels=3, out_channels=12, kernel_size=5),
            nn.MaxPool2d(kernel_size=3),
            nn.Conv2d(in_channels=12, out_channels=12, kernel_size=3),
            nn.AvgPool2d(kernel_size=3),
            Flatten(start_dim=1),
            nn.Linear(48, 32),
            nn.ReLU(),
            nn.Linear(32, 10),
            nn.Softmax(dim=1)
        )

本地测试

在本地测试的情况下，将跳过所有联合过程，并且模型将不执行fed平均

from federatedml.nn.homo.trainer.fedavg_trainer import FedAVGTrainer
trainer = FedAVGTrainer(epochs=5, batch_size=256, shuffle=True, data_loader_worker=8, pin_memory=False) # 参数
trainer.set_model(model)

trainer.local_mode() 

optimizer = t.optim.Adam(model.parameters(), lr=0.01)
loss = t.nn.CrossEntropyLoss()
trainer.train(train_set=dataset,optimizer=optimizer, loss=loss)

它可以工作，现在可以执行联合任务了

具有内置数据集的Homo NN任务

import torch as t
from torch import nn
from pipeline import fate_torch_hook
from pipeline.component import HomoNN
from pipeline.backend.pipeline import PipeLine
from pipeline.component import Reader, Evaluation, DataTransform
from pipeline.interface import Data, Model

t = fate_torch_hook(t)

import os
# bind data path to name & namespace
fate_project_path = os.path.abspath('../')
host = 10000
guest = 9999
arbiter = 10000
pipeline = PipeLine().set_initiator(role='guest', party_id=guest).set_roles(guest=guest, host=host,
                                                                            arbiter=arbiter)

data_0 = {"name": "mnist_guest", "namespace": "experiment"}
data_1 = {"name": "mnist_host", "namespace": "experiment"}
# 这里需要根据自己得版本作出调整，否则文件参数上传失败会报错
data_path_0 = fate_project_path + '/examples/data/mnist_train'
data_path_1 = fate_project_path + '/examples/data/mnist_train'
pipeline.bind_table(name=data_0['name'], namespace=data_0['namespace'], path=data_path_0)
pipeline.bind_table(name=data_1['name'], namespace=data_1['namespace'], path=data_path_1)

{'namespace': 'experiment', 'table_name': 'mnist_host'}

# 定义reader
reader_0 = Reader(name="reader_0")
reader_0.get_party_instance(role='guest', party_id=guest).component_param(table=data_0)
reader_0.get_party_instance(role='host', party_id=host).component_param(table=data_1)

from pipeline.component.homo_nn import DatasetParam, TrainerParam 

# a new model with conv layer, it can work with our ImageDataset
model = t.nn.Sequential(
            nn.Conv2d(in_channels=3, out_channels=12, kernel_size=5),
            nn.MaxPool2d(kernel_size=3),
            nn.Conv2d(in_channels=12, out_channels=12, kernel_size=3),
            nn.AvgPool2d(kernel_size=3),
            Flatten(start_dim=1),
            nn.Linear(48, 32),
            nn.ReLU(),
            nn.Linear(32, 10),
            nn.Softmax(dim=1)
        )

nn_component = HomoNN(name='nn_0',
                      model=model, # model
                      loss=t.nn.CrossEntropyLoss(),  # loss
                      optimizer=t.optim.Adam(model.parameters(), lr=0.01), # optimizer
                      dataset=DatasetParam(dataset_name='image', label_dtype='long'),  # dataset
                      trainer=TrainerParam(trainer_name='fedavg_trainer', epochs=2, batch_size=1024, validation_freqs=1),
                      torch_seed=100 # random seed
                      )

pipeline.add_component(reader_0)
pipeline.add_component(nn_component, data=Data(train_data=reader_0.output.data))
pipeline.add_component(Evaluation(name='eval_0', eval_type='multi'), data=Data(data=nn_component.output.data))

pipeline.compile()
pipeline.fit()