pip安装PyTorch =1.2、torchVision = 0.3时报错ImportError: DLL load failed: 原因是版本没对！

# -*- coding: utf-8 -*-

'''
@Time    : 2020/5/20 22:28
@Author  : HHNa
@FileName: dataset.py
@Software: PyCharm
 
'''

import os, sys, glob, shutil, json
import cv2

from PIL import Image
import numpy as np

import torch
from torch.utils.data.dataset import Dataset
import torchvision.transforms as transforms


class SVHNDataset(Dataset):
    def __init__(self, img_path, img_label, transform=None):
        self.img_path = img_path
        self.img_label = img_label
        if transform is not None:
            self.transform = transform
        else:
            self.transform = None

    def __getitem__(self, index):
        img = Image.open(self.img_path[index]).convert('RGB')

        if self.transform is not None:
            img = self.transform(img)

        # 原始SVHN中类别10为数字0
        lbl = np.array(self.img_label[index], dtype=np.int)
        lbl = list(lbl) + (5 - len(lbl)) * [10]

        return img, torch.from_numpy(np.array(lbl[:5]))

    def __len__(self):
        return len(self.img_path)


train_path = glob.glob('./data/train/mchar_train/*.png')
train_path.sort()
train_json = json.load(open('./data/train/mchar_train.json'))
train_label = [train_json[x]['label'] for x in train_json]

train_loader = torch.utils.data.DataLoader(
    SVHNDataset(train_path, train_label,
                transforms.Compose([
                    transforms.Resize((64, 128)),
                    transforms.ColorJitter(0.3, 0.3, 0.2),
                    transforms.RandomRotation(5),
                    transforms.ToTensor(),
                    transforms.Normalize([0.485, 0.456, 0.406], [0.229, 0.224, 0.225])
                ])),
    batch_size=10,  # 每批样本个数
    shuffle=False,  # 是否打乱顺序
    num_workers=10,  # 读取的线程个数
)

for data in train_loader:
    break

Traceback (most recent call last):
  File "G:/my_github_project/skills/CV_DataWhale_517/dataset.py", line 19, in
    import torchvision as transforms
  File "C:\Users\hhn\Anaconda3\envs\pytorch_1.2_gpu\lib\site-packages\torchvision\__init__.py", line 1, in
    from torchvision import models
  File "C:\Users\hhn\Anaconda3\envs\pytorch_1.2_gpu\lib\site-packages\torchvision\models\__init__.py", line 11, in
    from . import detection
  File "C:\Users\hhn\Anaconda3\envs\pytorch_1.2_gpu\lib\site-packages\torchvision\models\detection\__init__.py", line 1, in
    from .faster_rcnn import *
  File "C:\Users\hhn\Anaconda3\envs\pytorch_1.2_gpu\lib\site-packages\torchvision\models\detection\faster_rcnn.py", line 7, in
    from torchvision.ops import misc as misc_nn_ops
  File "C:\Users\hhn\Anaconda3\envs\pytorch_1.2_gpu\lib\site-packages\torchvision\ops\__init__.py", line 1, in
    from .boxes import nms, box_iou
  File "C:\Users\hhn\Anaconda3\envs\pytorch_1.2_gpu\lib\site-packages\torchvision\ops\boxes.py", line 2, in
    from torchvision import _C
ImportError: DLL load failed: 找不到指定的模块。

Process finished with exit code 1

 

尝试解决办法：

https://blog.csdn.net/zhenyu_an/article/details/103940020/

但是这个方式下载非常慢。

后来，我发现可能是torchvision和pytorch版本没对上的原因哈。

所以我卸载torchvision=0.3（pip uninstall torchvision）

pip install torchvision-0.4.0-cp36-cp36m-win_amd64.whl

完美解决！