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import torch
import torchvision
import torchvision.transforms as transforms
import torch.nn as nn

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)),
])

transform_test=transforms.Compose([
    transforms.ToTensor(),
    transforms.Normalize((0.4914, 0.4822, 0.4465), (0.2023, 0.1994, 0.2010)),
])

trainset=torchvision.datasets.CIFAR10(root='./data',train=True,download=True,transform=transform_train)
testset=torchvision.datasets.CIFAR10(root='./data',train=False,download=True,transform=transform_test)

trainloader=torch.utils.data.DataLoader(dataset=trainset,batch_size=128,shuffle=True,num_workers=2)
testloader=torch.utils.data.DataLoader(dataset=trainset,batch_size=100,shuffle=False,num_workers=2)

device=torch.device('mps')
Files already downloaded and verified
Files already downloaded and verified

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class Residual(nn.Module):
    def __init__(self,input_channels,output_channels,strides=1,change_channels=False):
        super().__init__()
        self.conv1=nn.Conv2d(in_channels=input_channels,out_channels=output_channels,kernel_size=3,stride=strides,padding=1)
        self.BN1=nn.BatchNorm2d(output_channels)
        self.conv2=nn.Conv2d(in_channels=output_channels,out_channels=output_channels,kernel_size=3,padding=1)
        self.BN2=nn.BatchNorm2d(output_channels)
        self.conv3=nn.Conv2d(in_channels=input_channels,out_channels=output_channels,kernel_size=1,stride=strides) if change_channels else None

    def forward(self,X):
        Y=self.BN2(self.conv2(nn.functional.relu(self.BN1(self.conv1(X)))))
        if self.conv3:
            X=self.conv3(X)
        return nn.functional.relu(Y+X)
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b1=nn.Sequential(
    nn.Conv2d(3,64,3,1,1),
    nn.BatchNorm2d(64),
    nn.ReLU(),
)

def residual_block(input_channels,output_channels,num_residuals,first_block=False):
    modules=[]
    if first_block:
        for i in range(num_residuals):
            modules.append(Residual(output_channels,output_channels))
    else:
        for i in range(num_residuals):
            if i==0:
                modules.append(Residual(input_channels,output_channels,2,True))
            else:
                modules.append(Residual(output_channels,output_channels))
    return modules

b2=nn.Sequential(*residual_block(64,64,2,True))
b3=nn.Sequential(*residual_block(64,128,2))
b4=nn.Sequential(*residual_block(128,256,2))
b5=nn.Sequential(*residual_block(256,512,2))

b6=nn.Sequential(
    nn.AdaptiveAvgPool2d((1,1)),
    nn.Flatten(),
    nn.Linear(512,10)
                 )

net=nn.Sequential(b1,b2,b3,b4,b5,b6)

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import time

# 配置参数
lr, epochs = 0.05, 10
optimizer = torch.optim.SGD(net.parameters(), lr=lr, momentum=0.9, weight_decay=5e-4)
loss = nn.CrossEntropyLoss()

device = torch.device("mps" if torch.backends.mps.is_available() else "cpu")
net.to(device)

print(f"训练设备: {device} | 初始学习率: {lr} | 总轮次: {epochs}")
print("-" * 60)

for e in range(epochs):
    # --- 训练阶段 ---
    net.train()
    train_l_sum, train_acc_sum, n = 0.0, 0.0, 0
    start_time = time.time()
    
    for X, y in trainloader:
        X, y = X.to(device), y.to(device)
        y_pred = net(X)
        l = loss(y_pred, y)
        optimizer.zero_grad()
        l.backward()
        optimizer.step()

        with torch.no_grad():
            train_l_sum += l.item() * y.shape[0]
            train_acc_sum += (y_pred.argmax(dim=1) == y).sum().item()
            n += y.shape[0]

    # --- 测试阶段 (每个 epoch 跑完验证一次) ---
    net.eval()
    test_acc_sum, test_n = 0.0, 0
    with torch.no_grad():
        for X_test, y_test in testloader:
            X_test, y_test = X_test.to(device), y_test.to(device)
            y_test_pred = net(X_test)
            test_acc_sum += (y_test_pred.argmax(dim=1) == y_test).sum().item()
            test_n += y_test.shape[0]

    # --- 打印日志 ---
    epoch_time = time.time() - start_time
    print(f'Epoch {e + 1:2d}: '
          f'Loss {train_l_sum/n:.4f} | '
          f'Train Acc {train_acc_sum/n*100:.2f}% | '
          f'Test Acc {test_acc_sum/test_n*100:.2f}% | '
          f'Time {epoch_time:.1f}s')

print("-" * 60)
print("训练结束！")
训练设备: mps | 初始学习率: 0.05 | 总轮次: 10
------------------------------------------------------------


/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/io/image.py:14: UserWarning: Failed to load image Python extension: 'dlopen(/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/image.so, 0x0006): Library not loaded: @rpath/libjpeg.9.dylib
  Referenced from: <0B7EB158-53DC-3403-8A49-22178CAB4612> /opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/image.so
  Reason: tried: '/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/../../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/../../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/lib/python3.10/lib-dynload/../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/bin/../lib/libjpeg.9.dylib' (no such file)'If you don't plan on using image functionality from `torchvision.io`, you can ignore this warning. Otherwise, there might be something wrong with your environment. Did you have `libjpeg` or `libpng` installed before building `torchvision` from source?
  warn(
/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/io/image.py:14: UserWarning: Failed to load image Python extension: 'dlopen(/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/image.so, 0x0006): Library not loaded: @rpath/libjpeg.9.dylib
  Referenced from: <0B7EB158-53DC-3403-8A49-22178CAB4612> /opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/image.so
  Reason: tried: '/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/../../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/../../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/lib/python3.10/lib-dynload/../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/bin/../lib/libjpeg.9.dylib' (no such file)'If you don't plan on using image functionality from `torchvision.io`, you can ignore this warning. Otherwise, there might be something wrong with your environment. Did you have `libjpeg` or `libpng` installed before building `torchvision` from source?
  warn(
/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/io/image.py:14: UserWarning: Failed to load image Python extension: 'dlopen(/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/image.so, 0x0006): Library not loaded: @rpath/libjpeg.9.dylib
  Referenced from: <0B7EB158-53DC-3403-8A49-22178CAB4612> /opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/image.so
  Reason: tried: '/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/../../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/../../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/lib/python3.10/lib-dynload/../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/bin/../lib/libjpeg.9.dylib' (no such file)'If you don't plan on using image functionality from `torchvision.io`, you can ignore this warning. Otherwise, there might be something wrong with your environment. Did you have `libjpeg` or `libpng` installed before building `torchvision` from source?
  warn(
/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/io/image.py:14: UserWarning: Failed to load image Python extension: 'dlopen(/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/image.so, 0x0006): Library not loaded: @rpath/libjpeg.9.dylib
  Referenced from: <0B7EB158-53DC-3403-8A49-22178CAB4612> /opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/image.so
  Reason: tried: '/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/../../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/../../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/lib/python3.10/lib-dynload/../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/bin/../lib/libjpeg.9.dylib' (no such file)'If you don't plan on using image functionality from `torchvision.io`, you can ignore this warning. Otherwise, there might be something wrong with your environment. Did you have `libjpeg` or `libpng` installed before building `torchvision` from source?
  warn(


Epoch  1: Loss 1.6245 | Train Acc 40.54% | Test Acc 48.14% | Time 110.8s


/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/io/image.py:14: UserWarning: Failed to load image Python extension: 'dlopen(/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/image.so, 0x0006): Library not loaded: @rpath/libjpeg.9.dylib
  Referenced from: <0B7EB158-53DC-3403-8A49-22178CAB4612> /opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/image.so
  Reason: tried: '/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/../../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/../../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/lib/python3.10/lib-dynload/../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/bin/../lib/libjpeg.9.dylib' (no such file)'If you don't plan on using image functionality from `torchvision.io`, you can ignore this warning. Otherwise, there might be something wrong with your environment. Did you have `libjpeg` or `libpng` installed before building `torchvision` from source?
  warn(
/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/io/image.py:14: UserWarning: Failed to load image Python extension: 'dlopen(/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/image.so, 0x0006): Library not loaded: @rpath/libjpeg.9.dylib
  Referenced from: <0B7EB158-53DC-3403-8A49-22178CAB4612> /opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/image.so
  Reason: tried: '/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/../../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/../../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/lib/python3.10/lib-dynload/../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/bin/../lib/libjpeg.9.dylib' (no such file)'If you don't plan on using image functionality from `torchvision.io`, you can ignore this warning. Otherwise, there might be something wrong with your environment. Did you have `libjpeg` or `libpng` installed before building `torchvision` from source?
  warn(
/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/io/image.py:14: UserWarning: Failed to load image Python extension: 'dlopen(/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/image.so, 0x0006): Library not loaded: @rpath/libjpeg.9.dylib
  Referenced from: <0B7EB158-53DC-3403-8A49-22178CAB4612> /opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/image.so
  Reason: tried: '/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/../../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/../../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/lib/python3.10/lib-dynload/../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/bin/../lib/libjpeg.9.dylib' (no such file)'If you don't plan on using image functionality from `torchvision.io`, you can ignore this warning. Otherwise, there might be something wrong with your environment. Did you have `libjpeg` or `libpng` installed before building `torchvision` from source?
  warn(
/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/io/image.py:14: UserWarning: Failed to load image Python extension: 'dlopen(/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/image.so, 0x0006): Library not loaded: @rpath/libjpeg.9.dylib
  Referenced from: <0B7EB158-53DC-3403-8A49-22178CAB4612> /opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/image.so
  Reason: tried: '/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/../../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/../../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/lib/python3.10/lib-dynload/../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/bin/../lib/libjpeg.9.dylib' (no such file)'If you don't plan on using image functionality from `torchvision.io`, you can ignore this warning. Otherwise, there might be something wrong with your environment. Did you have `libjpeg` or `libpng` installed before building `torchvision` from source?
  warn(


Epoch  2: Loss 1.1272 | Train Acc 59.75% | Test Acc 63.38% | Time 106.7s


/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/io/image.py:14: UserWarning: Failed to load image Python extension: 'dlopen(/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/image.so, 0x0006): Library not loaded: @rpath/libjpeg.9.dylib
  Referenced from: <0B7EB158-53DC-3403-8A49-22178CAB4612> /opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/image.so
  Reason: tried: '/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/../../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/../../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/lib/python3.10/lib-dynload/../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/bin/../lib/libjpeg.9.dylib' (no such file)'If you don't plan on using image functionality from `torchvision.io`, you can ignore this warning. Otherwise, there might be something wrong with your environment. Did you have `libjpeg` or `libpng` installed before building `torchvision` from source?
  warn(
/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/io/image.py:14: UserWarning: Failed to load image Python extension: 'dlopen(/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/image.so, 0x0006): Library not loaded: @rpath/libjpeg.9.dylib
  Referenced from: <0B7EB158-53DC-3403-8A49-22178CAB4612> /opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/image.so
  Reason: tried: '/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/../../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/../../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/lib/python3.10/lib-dynload/../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/bin/../lib/libjpeg.9.dylib' (no such file)'If you don't plan on using image functionality from `torchvision.io`, you can ignore this warning. Otherwise, there might be something wrong with your environment. Did you have `libjpeg` or `libpng` installed before building `torchvision` from source?
  warn(
/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/io/image.py:14: UserWarning: Failed to load image Python extension: 'dlopen(/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/image.so, 0x0006): Library not loaded: @rpath/libjpeg.9.dylib
  Referenced from: <0B7EB158-53DC-3403-8A49-22178CAB4612> /opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/image.so
  Reason: tried: '/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/../../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/../../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/lib/python3.10/lib-dynload/../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/bin/../lib/libjpeg.9.dylib' (no such file)'If you don't plan on using image functionality from `torchvision.io`, you can ignore this warning. Otherwise, there might be something wrong with your environment. Did you have `libjpeg` or `libpng` installed before building `torchvision` from source?
  warn(
/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/io/image.py:14: UserWarning: Failed to load image Python extension: 'dlopen(/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/image.so, 0x0006): Library not loaded: @rpath/libjpeg.9.dylib
  Referenced from: <0B7EB158-53DC-3403-8A49-22178CAB4612> /opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/image.so
  Reason: tried: '/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/../../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/../../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/lib/python3.10/lib-dynload/../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/bin/../lib/libjpeg.9.dylib' (no such file)'If you don't plan on using image functionality from `torchvision.io`, you can ignore this warning. Otherwise, there might be something wrong with your environment. Did you have `libjpeg` or `libpng` installed before building `torchvision` from source?
  warn(


Epoch  3: Loss 0.8511 | Train Acc 70.13% | Test Acc 72.90% | Time 105.8s


/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/io/image.py:14: UserWarning: Failed to load image Python extension: 'dlopen(/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/image.so, 0x0006): Library not loaded: @rpath/libjpeg.9.dylib
  Referenced from: <0B7EB158-53DC-3403-8A49-22178CAB4612> /opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/image.so
  Reason: tried: '/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/../../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/../../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/lib/python3.10/lib-dynload/../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/bin/../lib/libjpeg.9.dylib' (no such file)'If you don't plan on using image functionality from `torchvision.io`, you can ignore this warning. Otherwise, there might be something wrong with your environment. Did you have `libjpeg` or `libpng` installed before building `torchvision` from source?
  warn(
/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/io/image.py:14: UserWarning: Failed to load image Python extension: 'dlopen(/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/image.so, 0x0006): Library not loaded: @rpath/libjpeg.9.dylib
  Referenced from: <0B7EB158-53DC-3403-8A49-22178CAB4612> /opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/image.so
  Reason: tried: '/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/../../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/../../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/lib/python3.10/lib-dynload/../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/bin/../lib/libjpeg.9.dylib' (no such file)'If you don't plan on using image functionality from `torchvision.io`, you can ignore this warning. Otherwise, there might be something wrong with your environment. Did you have `libjpeg` or `libpng` installed before building `torchvision` from source?
  warn(
/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/io/image.py:14: UserWarning: Failed to load image Python extension: 'dlopen(/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/image.so, 0x0006): Library not loaded: @rpath/libjpeg.9.dylib
  Referenced from: <0B7EB158-53DC-3403-8A49-22178CAB4612> /opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/image.so
  Reason: tried: '/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/../../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/../../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/lib/python3.10/lib-dynload/../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/bin/../lib/libjpeg.9.dylib' (no such file)'If you don't plan on using image functionality from `torchvision.io`, you can ignore this warning. Otherwise, there might be something wrong with your environment. Did you have `libjpeg` or `libpng` installed before building `torchvision` from source?
  warn(
/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/io/image.py:14: UserWarning: Failed to load image Python extension: 'dlopen(/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/image.so, 0x0006): Library not loaded: @rpath/libjpeg.9.dylib
  Referenced from: <0B7EB158-53DC-3403-8A49-22178CAB4612> /opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/image.so
  Reason: tried: '/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/../../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/../../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/lib/python3.10/lib-dynload/../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/bin/../lib/libjpeg.9.dylib' (no such file)'If you don't plan on using image functionality from `torchvision.io`, you can ignore this warning. Otherwise, there might be something wrong with your environment. Did you have `libjpeg` or `libpng` installed before building `torchvision` from source?
  warn(


Epoch  4: Loss 0.6854 | Train Acc 76.21% | Test Acc 75.15% | Time 105.8s


/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/io/image.py:14: UserWarning: Failed to load image Python extension: 'dlopen(/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/image.so, 0x0006): Library not loaded: @rpath/libjpeg.9.dylib
  Referenced from: <0B7EB158-53DC-3403-8A49-22178CAB4612> /opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/image.so
  Reason: tried: '/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/../../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/../../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/lib/python3.10/lib-dynload/../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/bin/../lib/libjpeg.9.dylib' (no such file)'If you don't plan on using image functionality from `torchvision.io`, you can ignore this warning. Otherwise, there might be something wrong with your environment. Did you have `libjpeg` or `libpng` installed before building `torchvision` from source?
  warn(
/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/io/image.py:14: UserWarning: Failed to load image Python extension: 'dlopen(/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/image.so, 0x0006): Library not loaded: @rpath/libjpeg.9.dylib
  Referenced from: <0B7EB158-53DC-3403-8A49-22178CAB4612> /opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/image.so
  Reason: tried: '/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/../../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/../../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/lib/python3.10/lib-dynload/../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/bin/../lib/libjpeg.9.dylib' (no such file)'If you don't plan on using image functionality from `torchvision.io`, you can ignore this warning. Otherwise, there might be something wrong with your environment. Did you have `libjpeg` or `libpng` installed before building `torchvision` from source?
  warn(
/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/io/image.py:14: UserWarning: Failed to load image Python extension: 'dlopen(/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/image.so, 0x0006): Library not loaded: @rpath/libjpeg.9.dylib
  Referenced from: <0B7EB158-53DC-3403-8A49-22178CAB4612> /opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/image.so
  Reason: tried: '/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/../../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/../../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/lib/python3.10/lib-dynload/../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/bin/../lib/libjpeg.9.dylib' (no such file)'If you don't plan on using image functionality from `torchvision.io`, you can ignore this warning. Otherwise, there might be something wrong with your environment. Did you have `libjpeg` or `libpng` installed before building `torchvision` from source?
  warn(
/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/io/image.py:14: UserWarning: Failed to load image Python extension: 'dlopen(/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/image.so, 0x0006): Library not loaded: @rpath/libjpeg.9.dylib
  Referenced from: <0B7EB158-53DC-3403-8A49-22178CAB4612> /opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/image.so
  Reason: tried: '/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/../../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/../../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/lib/python3.10/lib-dynload/../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/bin/../lib/libjpeg.9.dylib' (no such file)'If you don't plan on using image functionality from `torchvision.io`, you can ignore this warning. Otherwise, there might be something wrong with your environment. Did you have `libjpeg` or `libpng` installed before building `torchvision` from source?
  warn(


Epoch  5: Loss 0.5899 | Train Acc 79.61% | Test Acc 79.46% | Time 105.8s


/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/io/image.py:14: UserWarning: Failed to load image Python extension: 'dlopen(/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/image.so, 0x0006): Library not loaded: @rpath/libjpeg.9.dylib
  Referenced from: <0B7EB158-53DC-3403-8A49-22178CAB4612> /opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/image.so
  Reason: tried: '/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/../../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/../../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/lib/python3.10/lib-dynload/../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/bin/../lib/libjpeg.9.dylib' (no such file)'If you don't plan on using image functionality from `torchvision.io`, you can ignore this warning. Otherwise, there might be something wrong with your environment. Did you have `libjpeg` or `libpng` installed before building `torchvision` from source?
  warn(
/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/io/image.py:14: UserWarning: Failed to load image Python extension: 'dlopen(/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/image.so, 0x0006): Library not loaded: @rpath/libjpeg.9.dylib
  Referenced from: <0B7EB158-53DC-3403-8A49-22178CAB4612> /opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/image.so
  Reason: tried: '/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/../../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/../../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/lib/python3.10/lib-dynload/../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/bin/../lib/libjpeg.9.dylib' (no such file)'If you don't plan on using image functionality from `torchvision.io`, you can ignore this warning. Otherwise, there might be something wrong with your environment. Did you have `libjpeg` or `libpng` installed before building `torchvision` from source?
  warn(
/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/io/image.py:14: UserWarning: Failed to load image Python extension: 'dlopen(/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/image.so, 0x0006): Library not loaded: @rpath/libjpeg.9.dylib
  Referenced from: <0B7EB158-53DC-3403-8A49-22178CAB4612> /opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/image.so
  Reason: tried: '/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/../../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/../../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/lib/python3.10/lib-dynload/../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/bin/../lib/libjpeg.9.dylib' (no such file)'If you don't plan on using image functionality from `torchvision.io`, you can ignore this warning. Otherwise, there might be something wrong with your environment. Did you have `libjpeg` or `libpng` installed before building `torchvision` from source?
  warn(
/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/io/image.py:14: UserWarning: Failed to load image Python extension: 'dlopen(/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/image.so, 0x0006): Library not loaded: @rpath/libjpeg.9.dylib
  Referenced from: <0B7EB158-53DC-3403-8A49-22178CAB4612> /opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/image.so
  Reason: tried: '/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/../../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/../../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/lib/python3.10/lib-dynload/../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/bin/../lib/libjpeg.9.dylib' (no such file)'If you don't plan on using image functionality from `torchvision.io`, you can ignore this warning. Otherwise, there might be something wrong with your environment. Did you have `libjpeg` or `libpng` installed before building `torchvision` from source?
  warn(


Epoch  6: Loss 0.5213 | Train Acc 82.09% | Test Acc 80.06% | Time 106.4s


/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/io/image.py:14: UserWarning: Failed to load image Python extension: 'dlopen(/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/image.so, 0x0006): Library not loaded: @rpath/libjpeg.9.dylib
  Referenced from: <0B7EB158-53DC-3403-8A49-22178CAB4612> /opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/image.so
  Reason: tried: '/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/../../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/../../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/lib/python3.10/lib-dynload/../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/bin/../lib/libjpeg.9.dylib' (no such file)'If you don't plan on using image functionality from `torchvision.io`, you can ignore this warning. Otherwise, there might be something wrong with your environment. Did you have `libjpeg` or `libpng` installed before building `torchvision` from source?
  warn(
/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/io/image.py:14: UserWarning: Failed to load image Python extension: 'dlopen(/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/image.so, 0x0006): Library not loaded: @rpath/libjpeg.9.dylib
  Referenced from: <0B7EB158-53DC-3403-8A49-22178CAB4612> /opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/image.so
  Reason: tried: '/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/../../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/../../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/lib/python3.10/lib-dynload/../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/bin/../lib/libjpeg.9.dylib' (no such file)'If you don't plan on using image functionality from `torchvision.io`, you can ignore this warning. Otherwise, there might be something wrong with your environment. Did you have `libjpeg` or `libpng` installed before building `torchvision` from source?
  warn(
/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/io/image.py:14: UserWarning: Failed to load image Python extension: 'dlopen(/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/image.so, 0x0006): Library not loaded: @rpath/libjpeg.9.dylib
  Referenced from: <0B7EB158-53DC-3403-8A49-22178CAB4612> /opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/image.so
  Reason: tried: '/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/../../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/../../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/lib/python3.10/lib-dynload/../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/bin/../lib/libjpeg.9.dylib' (no such file)'If you don't plan on using image functionality from `torchvision.io`, you can ignore this warning. Otherwise, there might be something wrong with your environment. Did you have `libjpeg` or `libpng` installed before building `torchvision` from source?
  warn(
/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/io/image.py:14: UserWarning: Failed to load image Python extension: 'dlopen(/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/image.so, 0x0006): Library not loaded: @rpath/libjpeg.9.dylib
  Referenced from: <0B7EB158-53DC-3403-8A49-22178CAB4612> /opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/image.so
  Reason: tried: '/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/../../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/../../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/lib/python3.10/lib-dynload/../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/bin/../lib/libjpeg.9.dylib' (no such file)'If you don't plan on using image functionality from `torchvision.io`, you can ignore this warning. Otherwise, there might be something wrong with your environment. Did you have `libjpeg` or `libpng` installed before building `torchvision` from source?
  warn(


Epoch  7: Loss 0.4784 | Train Acc 83.50% | Test Acc 81.98% | Time 106.8s


/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/io/image.py:14: UserWarning: Failed to load image Python extension: 'dlopen(/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/image.so, 0x0006): Library not loaded: @rpath/libjpeg.9.dylib
  Referenced from: <0B7EB158-53DC-3403-8A49-22178CAB4612> /opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/image.so
  Reason: tried: '/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/../../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/../../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/lib/python3.10/lib-dynload/../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/bin/../lib/libjpeg.9.dylib' (no such file)'If you don't plan on using image functionality from `torchvision.io`, you can ignore this warning. Otherwise, there might be something wrong with your environment. Did you have `libjpeg` or `libpng` installed before building `torchvision` from source?
  warn(
/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/io/image.py:14: UserWarning: Failed to load image Python extension: 'dlopen(/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/image.so, 0x0006): Library not loaded: @rpath/libjpeg.9.dylib
  Referenced from: <0B7EB158-53DC-3403-8A49-22178CAB4612> /opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/image.so
  Reason: tried: '/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/../../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/../../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/lib/python3.10/lib-dynload/../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/bin/../lib/libjpeg.9.dylib' (no such file)'If you don't plan on using image functionality from `torchvision.io`, you can ignore this warning. Otherwise, there might be something wrong with your environment. Did you have `libjpeg` or `libpng` installed before building `torchvision` from source?
  warn(
/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/io/image.py:14: UserWarning: Failed to load image Python extension: 'dlopen(/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/image.so, 0x0006): Library not loaded: @rpath/libjpeg.9.dylib
  Referenced from: <0B7EB158-53DC-3403-8A49-22178CAB4612> /opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/image.so
  Reason: tried: '/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/../../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/../../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/lib/python3.10/lib-dynload/../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/bin/../lib/libjpeg.9.dylib' (no such file)'If you don't plan on using image functionality from `torchvision.io`, you can ignore this warning. Otherwise, there might be something wrong with your environment. Did you have `libjpeg` or `libpng` installed before building `torchvision` from source?
  warn(
/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/io/image.py:14: UserWarning: Failed to load image Python extension: 'dlopen(/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/image.so, 0x0006): Library not loaded: @rpath/libjpeg.9.dylib
  Referenced from: <0B7EB158-53DC-3403-8A49-22178CAB4612> /opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/image.so
  Reason: tried: '/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/../../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/../../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/lib/python3.10/lib-dynload/../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/bin/../lib/libjpeg.9.dylib' (no such file)'If you don't plan on using image functionality from `torchvision.io`, you can ignore this warning. Otherwise, there might be something wrong with your environment. Did you have `libjpeg` or `libpng` installed before building `torchvision` from source?
  warn(


Epoch  8: Loss 0.4414 | Train Acc 84.85% | Test Acc 85.02% | Time 105.8s


/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/io/image.py:14: UserWarning: Failed to load image Python extension: 'dlopen(/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/image.so, 0x0006): Library not loaded: @rpath/libjpeg.9.dylib
  Referenced from: <0B7EB158-53DC-3403-8A49-22178CAB4612> /opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/image.so
  Reason: tried: '/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/../../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/../../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/lib/python3.10/lib-dynload/../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/bin/../lib/libjpeg.9.dylib' (no such file)'If you don't plan on using image functionality from `torchvision.io`, you can ignore this warning. Otherwise, there might be something wrong with your environment. Did you have `libjpeg` or `libpng` installed before building `torchvision` from source?
  warn(
/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/io/image.py:14: UserWarning: Failed to load image Python extension: 'dlopen(/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/image.so, 0x0006): Library not loaded: @rpath/libjpeg.9.dylib
  Referenced from: <0B7EB158-53DC-3403-8A49-22178CAB4612> /opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/image.so
  Reason: tried: '/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/../../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/../../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/lib/python3.10/lib-dynload/../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/bin/../lib/libjpeg.9.dylib' (no such file)'If you don't plan on using image functionality from `torchvision.io`, you can ignore this warning. Otherwise, there might be something wrong with your environment. Did you have `libjpeg` or `libpng` installed before building `torchvision` from source?
  warn(
/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/io/image.py:14: UserWarning: Failed to load image Python extension: 'dlopen(/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/image.so, 0x0006): Library not loaded: @rpath/libjpeg.9.dylib
  Referenced from: <0B7EB158-53DC-3403-8A49-22178CAB4612> /opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/image.so
  Reason: tried: '/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/../../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/../../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/lib/python3.10/lib-dynload/../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/bin/../lib/libjpeg.9.dylib' (no such file)'If you don't plan on using image functionality from `torchvision.io`, you can ignore this warning. Otherwise, there might be something wrong with your environment. Did you have `libjpeg` or `libpng` installed before building `torchvision` from source?
  warn(
/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/io/image.py:14: UserWarning: Failed to load image Python extension: 'dlopen(/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/image.so, 0x0006): Library not loaded: @rpath/libjpeg.9.dylib
  Referenced from: <0B7EB158-53DC-3403-8A49-22178CAB4612> /opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/image.so
  Reason: tried: '/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/../../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/../../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/lib/python3.10/lib-dynload/../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/bin/../lib/libjpeg.9.dylib' (no such file)'If you don't plan on using image functionality from `torchvision.io`, you can ignore this warning. Otherwise, there might be something wrong with your environment. Did you have `libjpeg` or `libpng` installed before building `torchvision` from source?
  warn(


Epoch  9: Loss 0.4096 | Train Acc 86.00% | Test Acc 85.49% | Time 105.7s


/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/io/image.py:14: UserWarning: Failed to load image Python extension: 'dlopen(/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/image.so, 0x0006): Library not loaded: @rpath/libjpeg.9.dylib
  Referenced from: <0B7EB158-53DC-3403-8A49-22178CAB4612> /opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/image.so
  Reason: tried: '/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/../../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/../../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/lib/python3.10/lib-dynload/../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/bin/../lib/libjpeg.9.dylib' (no such file)'If you don't plan on using image functionality from `torchvision.io`, you can ignore this warning. Otherwise, there might be something wrong with your environment. Did you have `libjpeg` or `libpng` installed before building `torchvision` from source?
  warn(
/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/io/image.py:14: UserWarning: Failed to load image Python extension: 'dlopen(/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/image.so, 0x0006): Library not loaded: @rpath/libjpeg.9.dylib
  Referenced from: <0B7EB158-53DC-3403-8A49-22178CAB4612> /opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/image.so
  Reason: tried: '/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/../../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/../../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/lib/python3.10/lib-dynload/../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/bin/../lib/libjpeg.9.dylib' (no such file)'If you don't plan on using image functionality from `torchvision.io`, you can ignore this warning. Otherwise, there might be something wrong with your environment. Did you have `libjpeg` or `libpng` installed before building `torchvision` from source?
  warn(
/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/io/image.py:14: UserWarning: Failed to load image Python extension: 'dlopen(/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/image.so, 0x0006): Library not loaded: @rpath/libjpeg.9.dylib
  Referenced from: <0B7EB158-53DC-3403-8A49-22178CAB4612> /opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/image.so
  Reason: tried: '/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/../../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/../../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/lib/python3.10/lib-dynload/../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/bin/../lib/libjpeg.9.dylib' (no such file)'If you don't plan on using image functionality from `torchvision.io`, you can ignore this warning. Otherwise, there might be something wrong with your environment. Did you have `libjpeg` or `libpng` installed before building `torchvision` from source?
  warn(
/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/io/image.py:14: UserWarning: Failed to load image Python extension: 'dlopen(/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/image.so, 0x0006): Library not loaded: @rpath/libjpeg.9.dylib
  Referenced from: <0B7EB158-53DC-3403-8A49-22178CAB4612> /opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/image.so
  Reason: tried: '/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/../../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/lib/python3.10/site-packages/torchvision/../../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/lib/python3.10/lib-dynload/../../libjpeg.9.dylib' (no such file), '/opt/anaconda3/envs/d2l/bin/../lib/libjpeg.9.dylib' (no such file)'If you don't plan on using image functionality from `torchvision.io`, you can ignore this warning. Otherwise, there might be something wrong with your environment. Did you have `libjpeg` or `libpng` installed before building `torchvision` from source?
  warn(


Epoch 10: Loss 0.3862 | Train Acc 86.83% | Test Acc 82.18% | Time 106.4s
------------------------------------------------------------
训练结束！