PyTorch使用Cifar-10数据集时报错：TypeError: default_collate
0
[已解决问题]
解决于 2024-04-09 09:58
报错
TypeError: default_collate: batch must contain tensors, numpy arrays, numbers, dicts or lists; found <class 'PIL.Image.Image'>
相关代码
from torch.utils.data import DataLoader
import torchvision
import torch
from sampler import *
torch.manual_seed(0)
train_dataset = torchvision.datasets.CIFAR10(root='./data', train=True, download=True)
train_dataloader = DataLoader(train_dataset, batch_size=32, sampler=ImbalancedDatasetSampler(train_dataset))
for i, (data, target) in enumerate(train_dataloader):
print(target)
if i == 5:
break
运行环境
pytorch 2.2.2 py3.12_cuda12.1_cudnn8_0 pytorch
torchvision 0.17.2 pypi_0 pypi
最佳答案
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cifar10数据集读入的图片没有转为张量导致的，添加将图片转为张量的模块即可：
from torch.utils.data import DataLoader
import torchvision
from sampler import *
from torchvision import transforms
transform_train = transforms.Compose([
transforms.RandomCrop(32, padding=4),
transforms.RandomHorizontalFlip(),
transforms.ToTensor(),
transforms.Normalize((0.4914, 0.4822, 0.4465), (0.2023, 0.1994, 0.2010)),
])
torch.manual_seed(0)
train_dataset = torchvision.datasets.CIFAR10(root='./data', train=True, download=True, transform=transform_train)
train_dataloader = DataLoader(train_dataset, batch_size=32, sampler=ImbalancedDatasetSampler(train_dataset))
for i, (data, target) in enumerate(train_dataloader):
print(target)
if i == 5:
break