python-2.7 – conda update scikit-learn(也是scipy和numpy)

发布时间：2020-12-20 11:51:17 所属栏目：Python 来源：网络整理

导读：当我应该使用conda时,我想我使用pip install弄得一团糟.因此,我无法将scikit-learn软件包更新到最新版本.我用conda和pip卸载scikit-learn,然后使用conda再次安装但是现在我有问题导入sklearn： Python 2.7.11 |Anaconda custom (x86_64)| (default,Dec 6 201

当我应该使用conda时,我想我使用pip install弄得一团糟.因此,我无法将scikit-learn软件包更新到最新版本.我用conda和pip卸载scikit-learn,然后使用conda再次安装但是现在我有问题导入sklearn：

Python 2.7.11 |Anaconda custom (x86_64)| (default,Dec  6 2015,18:57:58) 
[GCC 4.2.1 (Apple Inc. build 5577)] on darwin
Type "help","copyright","credits" or "license" for more information.
Anaconda is brought to you by Continuum Analytics.
Please check out: http://continuum.io/thanks and https://anaconda.org

from sklearn import metrics
Traceback (most recent call last):
  File "<stdin>",line 1,in <module>
  File "/Users/bowang/anaconda/lib/python2.7/site-packages/sklearn/metrics/__init__.py",line 7,in <module>
    from .ranking import auc
ImportError: No module named ranking

此外,它实际上使用的sklearn / numpy / scipy版本似乎存在混淆：

$conda update scikit-learn
Using Anaconda Cloud api site https://api.anaconda.org
Fetching package metadata: ......
Solving package specifications: .........

# All requested packages already installed.
# packages in environment at /Users/bowang/anaconda:
#
scikit-learn              0.15.2               np18py27_0    http://repo.continuum.io/pkgs/free/osx-64/scikit-learn-0.15.2-np18py27_0.tar.bz2

$conda update scipy
Using Anaconda Cloud api site https://api.anaconda.org
Fetching package metadata: ......
Solving package specifications: .........

# All requested packages already installed.
# packages in environment at /Users/bowang/anaconda:
#
scipy                     0.14.0               np18py27_0    http://repo.continuum.io/pkgs/free/osx-64/scipy-0.14.0-np18py27_0.tar.bz2

以上显示我仍然无法更新到最新版本但是：

$python
Python 2.7.11 |Anaconda custom (x86_64)| (default,"credits" or "license" for more information.
Anaconda is brought to you by Continuum Analytics.
Please check out: http://continuum.io/thanks and https://anaconda.org
>>> import scipy
>>> scipy.__version__
'0.17.0'
>>> import numpy
>>> numpy.__version__
'1.11.0'
>>> import sklearn
>>> sklearn.__version__
'0.17.1'

有没有办法清理和解决这里的所有混淆,并允许我更新,从而使用最新版本的sklearn / numpy / scipy？谢谢！

解决方法

看起来conda报告的版本与运行Python时导入的版本不匹配.这让我觉得你已经在多个地方安装了这些软件包,并设置了你的$PYTHONPATH变量,以便Python找到不同的安装(有时安装一些工具包会在你的bash / sh启动脚本中添加它)尝试运行

$echo $PYTHONPATH

如果此处显示任何内容,请找到您的启动脚本并对其进行评论.
确保$PYTHONPATH为空后,请尝试以下操作：

$conda update conda  # make sure package listing is up-to-date
$conda remove numpy scipy scikit-learn
$conda install scikit-learn

这在过去对我来说一般都有用.

（编辑：李大同）

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