Python MNIST数据集无法转换为张量对象
如何正确地将MNIST数据集转换为张量类型?我在下面试过,但没有成功。错误消息Python MNIST数据集无法转换为张量对象,python,numpy,machine-learning,pytorch,Python,Numpy,Machine Learning,Pytorch,如何正确地将MNIST数据集转换为张量类型?我在下面试过,但没有成功。错误消息AttributeError:'int'对象没有属性'type'表明它不是张量类型 下面的代码可以在Google Colab中测试 PyTorch 1.3.1版似乎可以运行此功能,但不能运行1.5.1版 >>> import torch >>> import torch.nn as nn >>> import torchvision.transforms as tr
AttributeError:'int'对象没有属性'type'
表明它不是张量类型
下面的代码可以在Google Colab中测试
PyTorch 1.3.1版似乎可以运行此功能,但不能运行1.5.1版
>>> import torch
>>> import torch.nn as nn
>>> import torchvision.transforms as transforms
>>> import torchvision.datasets as dsets
>>> import numpy as np
>>> torch.__version__
1.5.1+cu101
>>> train_dataset = dsets.MNIST(root='./data', train=True, download=True, transform=transforms.ToTensor())
Downloading http://yann.lecun.com/exdb/mnist/train-images-idx3-ubyte.gz to ./data/MNIST/raw/train-images-idx3-ubyte.gz
100.1%Extracting ./data/MNIST/raw/train-images-idx3-ubyte.gz to ./data/MNIST/raw
Downloading http://yann.lecun.com/exdb/mnist/train-labels-idx1-ubyte.gz to ./data/MNIST/raw/train-labels-idx1-ubyte.gz
113.5%Extracting ./data/MNIST/raw/train-labels-idx1-ubyte.gz to ./data/MNIST/raw
Downloading http://yann.lecun.com/exdb/mnist/t10k-images-idx3-ubyte.gz to ./data/MNIST/raw/t10k-images-idx3-ubyte.gz
100.4%Extracting ./data/MNIST/raw/t10k-images-idx3-ubyte.gz to ./data/MNIST/raw
Downloading http://yann.lecun.com/exdb/mnist/t10k-labels-idx1-ubyte.gz to ./data/MNIST/raw/t10k-labels-idx1-ubyte.gz
180.4%Extracting ./data/MNIST/raw/t10k-labels-idx1-ubyte.gz to ./data/MNIST/raw
Processing...
/pytorch/torch/csrc/utils/tensor_numpy.cpp:141: UserWarning: The given NumPy array is not writeable, and PyTorch does not support non-writeable tensors. This means you can write to the underlying (supposedly non-writeable) NumPy array using the tensor. You may want to copy the array to protect its data or make it writeable before converting it to a tensor. This type of warning will be suppressed for the rest of this program.
Done!
>>> print("Print the training dataset:\n ", train_dataset)
Print the training dataset:
Dataset MNIST
Number of datapoints: 60000
Root location: ./data
Split: Train
StandardTransform
Transform: ToTensor()
>>> print("Type of data element: ", train_dataset[0][1].type())
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
AttributeError: 'int' object has no attribute 'type'
导入火炬
>>>导入torch.nn作为nn
>>>导入torchvision.transforms作为变换
>>>将torchvision.dataset导入为数据集
>>>将numpy作为np导入
>>>手电筒__
1.5.1+cu101
>>>train_dataset=dsets.MNIST(root='./data',train=True,download=True,transform=transforms.ToTensor())
正在下载http://yann.lecun.com/exdb/mnist/train-images-idx3-ubyte.gz 至./data/MNIST/raw/train-images-idx3-ubyte.gz
100.1%提取./data/MNIST/raw/train-images-idx3-ubyte.gz至./data/MNIST/raw
正在下载http://yann.lecun.com/exdb/mnist/train-labels-idx1-ubyte.gz 至./data/MNIST/raw/train-labels-idx1-ubyte.gz
113.5%提取./data/MNIST/raw/train-labels-idx1-ubyte.gz至./data/MNIST/raw
正在下载http://yann.lecun.com/exdb/mnist/t10k-images-idx3-ubyte.gz 至./data/MNIST/raw/t10k-images-idx3-ubyte.gz
100.4%提取./data/MNIST/raw/t10k-images-idx3-ubyte.gz至./data/MNIST/raw
正在下载http://yann.lecun.com/exdb/mnist/t10k-labels-idx1-ubyte.gz 至./data/MNIST/raw/t10k-labels-idx1-ubyte.gz
180.4%提取./data/MNIST/raw/t10k-labels-idx1-ubyte.gz至./data/MNIST/raw
处理。。。
/pytorch/torch/csc/utils/tensor_numpy.cpp:141:UserWarning:给定的numpy数组不可写,pytorch不支持不可写的张量。这意味着您可以使用张量写入底层(假定不可写)NumPy数组。在将数组转换为张量之前,可能需要复制数组以保护其数据或使其可写。在本程序的其余部分,此类警告将被抑制。
完成!
>>>打印(“打印训练数据集:\n”,训练数据集)
打印培训数据集:
数据集MNIST
数据点数量:60000
根位置:./data
分开:火车
标准变换
Transform:ToTensor()
>>>打印(“数据元素类型:”,列数据集[0][1]。类型()
回溯(最近一次呼叫最后一次):
文件“”,第1行,在
AttributeError:“int”对象没有属性“type”
您需要访问Ist元素(对应于图像张量),而不是第二个元素(标签),即
谢谢,但是为什么标签不是1.5.1版中的
LongTensor
?
>>> print("Type of data element: ", train_dataset[0][0].type())
Type of data element: torch.FloatTensor
>>> print(train_dataset[0][0].shape, train_dataset[0][1])
(torch.Size([1, 28, 28]), 5)