@[toc]

一、报错代码

from sklearn.datasets import fetch_mldata
mnist = fetch_mldata('MNIST original')

二、报错信息

ImportError                               Traceback (most recent call last)
Cell In [6], line 7
      5 import matplotlib
      6 import matplotlib.pyplot as plt
----> 7 from sklearn.datasets import fetch_mldata
      9 plt.rcParams['axes.labelsize'] = 14
     10 plt.rcParams['xtick.labelsize'] = 12

ImportError: cannot import name 'fetch_mldata' from 'sklearn.datasets' (E:\Environment\Python\Anaconda3\install\envs\Python3812\lib\site-packages\sklearn\datasets\__init__.py)

三、报错原因

**版本问题，scikit-learn版本0.19之前可以。
sklearn的0.2版本往后，fetch_mldata函数已经被fetch_openml函数取代**

四、解决方案

将导入代码替换为：

from sklearn.datasets import fetch_openml

读取mnist手写数据集的代码改为：

mnist = fetch_openml('mnist_784')