如何在加载 MNIST 数据集时修复 'No such file or directory' 错误

How to fix 'No such file or directory' error while loading MNIST dataset

我已经从 yann.lecun.com 下载了 MNIST 训练图像和标签并解压缩了它们。我正在尝试使用此代码加载它们-

from mlxtend.data import loadlocal_mnist

features,labels = loadlocal_mnist(
    images_path='/python/mnist-files/train-images-idx3-ubyte',
    labels_path='/python/mnist-files/train-labels-idx1-ubyte')

但是,我得到这个错误 -

Traceback (most recent call last):
  File "generateClassifier.py", line 12, in <module>
    labels_path='/python/mnist-files/train-labels-idx1-ubyte')
  File "/home/inglorion/.local/lib/python3.6/site- 
packages/mlxtend/data/local_mnist.py", line 36, in loadlocal_mnist
    with open(labels_path, 'rb') as lbpath:
FileNotFoundError: [Errno 2] No such file or directory: '/python/mnist- 
files/train-labels-idx1-ubyte'

目录存在,文件名正确。我该如何解决这个问题?

编辑:我对 python-mnist 包进行了同样的尝试-

from mnist import MNIST
mndata = MNIST('/python/mnist-files')
features,labels = mndata.load_training()

我遇到了类似的错误-

Traceback (most recent call last):
  File "generateClassifier.py", line 11, in <module>
    features,labels = mndata.load_training()
  File "/home/inglorion/.local/lib/python3.6/site-packages/mnist/loader.py", 
line 126, in load_training
    os.path.join(self.path, self.train_lbl_fname))
  File "/home/inglorion/.local/lib/python3.6/site-packages/mnist/loader.py", 
line 247, in load
    with self.opener(path_lbl, 'rb') as file:
  File "/home/inglorion/.local/lib/python3.6/site-packages/mnist/loader.py", 
line 239, in opener
    return open(path_fn, *args, **kwargs)
FileNotFoundError: [Errno 2] No such file or directory: '/python/mnist- 
files/train-labels-idx1-ubyte'

错误似乎只与训练标签文件有关;我尝试重新下载文件,但没有解决问题。

编辑 2:根据要求,这是 ls -l /python/mnist-files-

的输出
total 46156
-rw-r--r-- 1 inglorion inglorion 47040016 Jul 21  2000 train-images-idx3- 
ubyte
-rw-r--r-- 1 inglorion inglorion    60008 Jul 21  2000 train-labels-idx1- 
ubyte
-rw-r--r-- 1 inglorion inglorion   147970 Feb  8 22:43 wget-log
-rw-r--r-- 1 inglorion inglorion      682 Feb  9 14:40 wget-log.1

编辑 3:这是 print(os.listdir('/python/mnist-files')) 的输出:

FileNotFoundError: [Errno 2] No such file or directory: '/python/mnist-files'

我完全迷惑了-我知道目录存在!当我 cd 进入 /python!

时我可以看到它

您可以尝试使用此代码。

from tensorflow.examples.tutorials.mnist import input_data
mnist = input_data.read_data_sets('MNIST_data', validation_size=0)

我已经执行了代码并且运行良好!!希望对您有所帮助。

/~是有区别的。默认情况下,

os.dir('/')

将在 '/' 检查。我猜你的文件 python 在 '~' 中,即你的主目录。

你可以试试这个:

from os.path import expanduser
home = expanduser("~")+'/python/mnist-files'
mndata = MNIST(home)
features,labels = mndata.load_training()

如果有帮助请告诉我。

对我来说,它有助于将文件重命名为 train-images.idx3-ubyte 而不是 train-images-idx3-ubyteimages 之后的 - 更改为 .)。