sklearn导入错误 - ImportError: 无法导入'comb'名称。

Question

我想要做这个：

from sklearn.model_selection import train_test_split

并收到一个错误：

In [31]: from sklearn.model_selection import train_test_split
---------------------------------------------------------------------------
ImportError                               Traceback (most recent call last)
<ipython-input-31-73edc048c06b> in <module>()
----> 1 from sklearn.model_selection import train_test_split

/usr/local/lib/python3.6/site-packages/sklearn/model_selection/__init__.py in <module>()
----> 1 from ._split import BaseCrossValidator
      2 from ._split import KFold
      3 from ._split import GroupKFold
      4 from ._split import StratifiedKFold
      5 from ._split import TimeSeriesSplit

/usr/local/lib/python3.6/site-packages/sklearn/model_selection/_split.py in <module>()
     29 from ..externals.six import with_metaclass
     30 from ..externals.six.moves import zip
---> 31 from ..utils.fixes import signature, comb
     32 from ..base import _pprint
     33 

ImportError: cannot import name 'comb'

任何帮助都将不胜感激。

- steff

---

请尝试重新安装scikit-learn。 - Vivek Kumar

确实，那招起作用了。谢谢Vivek！ - steff

当我运行'from bayes_opt import BayesianOptimization'时，我遇到了相同的问题。 - MyopicVisage

Answer 1

SciPy >=0.19 使用 from scipy.special import comb 替代 from scipy.misc import comb。https://github.com/scikit-learn/scikit-learn/pull/9046

utils/fixes.py 源代码

try:  # SciPy >= 0.19
    from scipy.special import comb, logsumexp
except ImportError:
    from scipy.misc import comb, logsumexp  # noqa 

- qwr

Answer 2

我遇到了同样的错误。运行conda remove --name your environment --all命令删除环境，然后重新安装该环境即可。这对我起作用了。

- Hakan ÖCAL

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似乎问题是由特定的软件包（scipy）引起的，正如@qwr所指出的那样。因此，删除整个环境是不必要的。 - user3521099