data = dict( videos_per_gpu=8, workers_per_gpu=2, val_dataloader=dict( videos_per_gpu=1, workers_per_gpu=1 ), test_dataloader=dict( videos_per_gpu=1, workers_per_gpu=1 ), train=dict( type=dataset_type, ann_file=ann_file_train, data_prefix=data_root, pipeline=train_pipeline), val=dict( type=dataset_type, ann_file=ann_file_val, data_prefix=data_root_val, pipeline=val_pipeline), test=dict( type=dataset_type, ann_file=ann_file_test, data_prefix=data_root_val, pipeline=test_pipeline)) evaluation = dict( interval=5, metrics=['top_k_accuracy', 'mean_class_accuracy'])
时间: 2023-06-19 18:07:54 浏览: 115
这段代码是一个字典,定义了数据集的一些参数和评估的一些参数。其中,数据集的参数包括:
- 每个GPU上的视频数量(videos_per_gpu)
- 每个GPU上的工作进程数量(workers_per_gpu)
- 验证集数据加载器的参数,包括每个GPU上的视频数量和工作进程数量
- 测试集数据加载器的参数,包括每个GPU上的视频数量和工作进程数量
- 训练集的类型(type)、注释文件(ann_file_train)、数据前缀(data_prefix)和数据处理管道(pipeline)
- 验证集的类型(type)、注释文件(ann_file_val)、数据前缀(data_prefix_val)和数据处理管道(pipeline)
- 测试集的类型(type)、注释文件(ann_file_test)、数据前缀(data_prefix_val)和数据处理管道(pipeline)
评估参数包括:
- 评估间隔(interval)
- 评估指标列表(metrics),包括top_k_accuracy和mean_class_accuracy。
相关问题
为每句代码做注释:flower_list = train_dataset.class_to_idx cla_dict = dict((val, key) for key, val in flower_list.items()) json_str = json.dumps(cla_dict, indent=4) with open('class_indices.json', 'w') as json_file: json_file.write(json_str) batch_size = 16 nw = min([os.cpu_count(), batch_size if batch_size > 1 else 0, 8]) print('Using {} dataloader workers every process'.format(nw)) train_loader = torch.utils.data.DataLoader(train_dataset, batch_size=batch_size, shuffle=True, num_workers=0) validate_dataset = datasets.ImageFolder(root=os.path.join(image_path, "val"), transform=data_transform["val"]) val_num = len(validate_dataset) validate_loader = torch.utils.data.DataLoader(validate_dataset, batch_size=batch_size, shuffle=False, num_workers=0) print("using {} images for training, {} images for validation.".format(train_num, val_num))
# 创建一个包含所有花的列表,列表中每个元素都是一种花的类别索引
flower_list = train_dataset.class_to_idx
# 将key和value互换位置,将花的类别索引转换为花的名称
cla_dict = dict((val, key) for key, val in flower_list.items())
# 将字典转换为json格式的字符串
json_str = json.dumps(cla_dict, indent=4)
# 将json字符串写入文件class_indices.json中
with open('class_indices.json', 'w') as json_file:
json_file.write(json_str)
# 设置批大小为16,设置dataloader的worker数量,确保不超过CPU核心数和批大小
batch_size = 16
nw = min([os.cpu_count(), batch_size if batch_size > 1 else 0, 8])
print('Using {} dataloader workers every process'.format(nw))
# 创建训练集dataloader
train_loader = torch.utils.data.DataLoader(train_dataset, batch_size=batch_size, shuffle=True, num_workers=0)
# 创建验证集dataset和dataloader
validate_dataset = datasets.ImageFolder(root=os.path.join(image_path, "val"), transform=data_transform["val"])
val_num = len(validate_dataset)
validate_loader = torch.utils.data.DataLoader(validate_dataset, batch_size=batch_size, shuffle=False, num_workers=0)
# 打印训练集和验证集的图片数量
print("using {} images for training, {} images for validation.".format(train_num, val_num))
给你提供了完整代码,但在运行以下代码时出现上述错误,该如何解决?Batch_size = 9 DataSet = DataSet(np.array(x_train), list(y_train)) train_size = int(len(x_train)*0.8) test_size = len(y_train) - train_size train_dataset, test_dataset = torch.utils.data.random_split(DataSet, [train_size, test_size]) TrainDataloader = Data.DataLoader(train_dataset, batch_size=Batch_size, shuffle=False, drop_last=True) TestDataloader = Data.DataLoader(test_dataset, batch_size=Batch_size, shuffle=False, drop_last=True) model = Transformer(n_encoder_inputs=3, n_decoder_inputs=3, Sequence_length=1).to(device) epochs = 10 optimizer = torch.optim.Adam(model.parameters(), lr=0.0001) criterion = torch.nn.MSELoss().to(device) val_loss = [] train_loss = [] best_best_loss = 10000000 for epoch in tqdm(range(epochs)): train_epoch_loss = [] for index, (inputs, targets) in enumerate(TrainDataloader): inputs = torch.tensor(inputs).to(device) targets = torch.tensor(targets).to(device) inputs = inputs.float() targets = targets.float() tgt_in = torch.rand((Batch_size, 1, 3)) outputs = model(inputs, tgt_in) loss = criterion(outputs.float(), targets.float()) print("loss", loss) loss.backward() optimizer.step() train_epoch_loss.append(loss.item()) train_loss.append(np.mean(train_epoch_loss)) val_epoch_loss = _test() val_loss.append(val_epoch_loss) print("epoch:", epoch, "train_epoch_loss:", train_epoch_loss, "val_epoch_loss:", val_epoch_loss) if val_epoch_loss < best_best_loss: best_best_loss = val_epoch_loss best_model = model print("best_best_loss ---------------------------", best_best_loss) torch.save(best_model.state_dict(), 'best_Transformer_trainModel.pth')
根据你提供的完整代码,错误信息可能是在以下部分出现问题:
```python
for index, (inputs, targets) in enumerate(TrainDataloader):
# ...
tgt_in = torch.rand((Batch_size, 1, 3))
outputs = model(inputs, tgt_in)
# ...
```
你在每次循环中都使用 `torch.rand` 函数生成了一个形状为 `(Batch_size, 1, 3)` 的随机张量 `tgt_in`,然后将其作为模型的输入之一。然而,这个随机张量的维度不匹配模型的期望输入维度。
为了解决这个问题,你可以将 `tgt_in` 的维度调整为与模型期望的维度相匹配。根据你之前提供的信息,`n_decoder_inputs` 是模型期望的输入维度,因此可以使用 `torch.rand` 生成一个形状为 `(Batch_size, n_decoder_inputs, Sequence_length)` 的随机张量。根据你的代码,`n_decoder_inputs` 和 `Sequence_length` 都是 3,所以你可以将以下行:
```python
tgt_in = torch.rand((Batch_size, 1, 3))
```
更改为:
```python
tgt_in = torch.rand((Batch_size, 3, 1))
```
这样,`tgt_in` 的维度就与模型的期望输入维度匹配了。请尝试进行这个修改并重新运行代码,看看是否能够解决错误。
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