python-2.7 - 在sklearn中使用datasets.fetch_mldata()时出现IO错误

Question

我导入了 fetch_mldata从 sklearn.datasets 导入 fetch_mldata并称:

dataset = fetch_mldata('MNIST original')

但我得到的是以下内容:

> Traceback (most recent call last):   File "<stdin>", line 1, in
> <module>   File
> "C:\Users\Jacob\Development\Anaconda\lib\site-packages\spyderlib\widgets\externalshell\sitecustomize.py",
> line 540, in runfile
>     execfile(filename, namespace)   File "C:/Users/Jacob/Documents/Dropbox/Technion/Semester 8/Machine
> learning/Demo3/Demo3.py", line 75, in <module>
>     dataset = fetch_mldata('MNIST original')    File "C:\Users\Jacob\Development\Anaconda\lib\site-packages\sklearn\datasets\mldata.py",
> line 158, in fetch_mldata
>     matlab_dict = io.loadmat(matlab_file, struct_as_record=True)   File
> "C:\Users\Jacob\Development\Anaconda\lib\site-packages\scipy\io\matlab\mio.py",
> line 126, in loadmat
>     matfile_dict = MR.get_variables(variable_names)   File "C:\Users\Jacob\Development\Anaconda\lib\site-packages\scipy\io\matlab\mio5.py",
> line 288, in get_variables
>     res = self.read_var_array(hdr, process)   File "C:\Users\Jacob\Development\Anaconda\lib\site-packages\scipy\io\matlab\mio5.py",
> line 248, in read_var_array
>     return self._matrix_reader.array_from_header(header, process)   File "mio5_utils.pyx", line 616, in
> scipy.io.matlab.mio5_utils.VarReader5.array_from_header
> (scipy\io\matlab\mio5_utils.c:5903)   File "mio5_utils.pyx", line 645,
> in scipy.io.matlab.mio5_utils.VarReader5.array_from_header
> (scipy\io\matlab\mio5_utils.c:5332)   File "mio5_utils.pyx", line 713,
> in scipy.io.matlab.mio5_utils.VarReader5.read_real_complex
> (scipy\io\matlab\mio5_utils.c:6323)   File "mio5_utils.pyx", line 417,
> in scipy.io.matlab.mio5_utils.VarReader5.read_numeric
> (scipy\io\matlab\mio5_utils.c:3873)   File "mio5_utils.pyx", line 353,
> in scipy.io.matlab.mio5_utils.VarReader5.read_element
> (scipy\io\matlab\mio5_utils.c:3595)   File "streams.pyx", line 324, in
> scipy.io.matlab.streams.FileStream.read_string
> (scipy\io\matlab\streams.c:4343) IOError: could not read bytes

我尝试下载较新版本的 sklearn，但没有帮助。我有另一个关于这个问题的帖子，但那里提供的解决方案对我没有帮助。 How to use datasets.fetch_mldata() in sklearn?

有什么想法吗？

Answer 1

供您/其他人引用，我遇到了几乎相同的错误(Ubuntu)，包括“IOError:无法读取字节”错误。

我刚刚发布了一个解决方案

How to use datasets.fetch_mldata() in sklearn?

简短回答 - 使用以下内容:

from sklearn.datasets.mldata import fetch_mldata
    data = fetch_mldata('mnist-original')

dataset = fetch_mldata('mnist-original', data_home='***')

将 ***(保留引号)替换为您的首选位置(数据目录)。