BlueMix:无法将更新的sklearn导入iPython

Question

我在IBMBlueMix上运行一个ipython笔记本，sklearn的默认版本是0.11——我想升级到sklearn-0.18。

编辑：我是说我想升级到sklearn-0.17。

import sklearn
print sklearn.__version__

​0.11

BlueMix文档说要使用：

^{pr2}$

输出如下：

You are using pip version 7.1.0, however version 8.0.1 is available.
You should consider upgrading via the 'pip install --upgrade pip' command.
Requirement already up-to-date: sklearn in /gpfs/global_fs01/sym_shared/YPProdSpark/user/s3b2-519e0ce881616c-546ab68fb1ed/.local/lib/python2.7/site-packages
Collecting scikit-learn (from sklearn)
  Using cached scikit-learn-0.17.tar.gz
Installing collected packages: scikit-learn
  Running setup.py install for scikit-learn
Successfully installed scikit-learn-0.11

那似乎没用。也许这和旧版的pip有关。。。

!pip install --upgrade --user pip


You are using pip version 7.1.0, however version 8.0.1 is available.
You should consider upgrading via the 'pip install --upgrade pip' command.
Collecting pip
  Using cached pip-8.0.2-py2.py3-none-any.whl
Installing collected packages: pip
Successfully installed pip-7.1.0


import pip
print pip.__version__

7.1.0

好吧，所以这不仅仅是学识。问题似乎是升级包的安装路径不正确。

经过一番侦查，我发现：

!ls -al ~/.local/lib/python2.7/site-packages

total 0
drwx------  8 s3b2-519e0ce881616c-546ab68fb1ed users 4096 Jan 22 18:06 .
drwx------  3 s3b2-519e0ce881616c-546ab68fb1ed users 4096 Jan 22 15:30 ..
drwxr-xr-x 10 s3b2-519e0ce881616c-546ab68fb1ed users 4096 Jan 22 15:46 pip
drwxr-xr-x  2 s3b2-519e0ce881616c-546ab68fb1ed users 4096 Jan 22 15:53 pip-8.0.1.dist-info
drwxr-xr-x  2 s3b2-519e0ce881616c-546ab68fb1ed users 4096 Jan 22 18:40 pip-8.0.2.dist-info
drwxr-xr-x  2 s3b2-519e0ce881616c-546ab68fb1ed users 4096 Jan 22 18:06 scikit_learn-0.17-py2.7.egg-info
drwxr-xr-x 25 s3b2-519e0ce881616c-546ab68fb1ed users 4096 Jan 22 18:06 sklearn
drwxr-xr-x  2 s3b2-519e0ce881616c-546ab68fb1ed users 4096 Jan 22 15:48 sklearn-0.0-py2.7.egg-info

所以，让我们试试这个。。。

import sys
sys.path.insert(0, '/gpfs/fs01/user/s3b2-519e0ce881616c-546ab68fb1ed/.local/lib/python2.7/site-packages/')

reload(sklearn)
print sklearn.__version__

​0.17

现在，看起来版本是正确的，所以尝试从sklearn-0.17导入一些新函数。

from sklearn.metrics import roc_auc_score


---------------------------------------------------------------------------
ImportError                               Traceback (most recent call last)
<ipython-input-169-8985e3efac9f> in <module>()
----> 1 from sklearn.metrics import roc_auc_score

ImportError: cannot import name roc_auc_score

我在0.17版本中遇到了同样的错误。在尝试导入时，python似乎在引用旧的sklearn版本0.11。

感谢任何帮助。

Answer 1

问题解决了！在

BlueMix似乎每次登录时都会将iPython环境初始化为sklearn-0.11。显然，一旦我导入了sklearnverison0.11，用版本0.17的新路径重新加载sklearn不会改变任何东西。在

在进行初始导入之前，我需要修改路径以指向版本0.17，然后初始导入将引用更新的版本，如下所示。。。在

import sys
sys.path.insert(0, '/gpfs/fs01/user/s3b2-519e0ce881616c-546ab68fb1ed/.local/lib/python2.7/site-packages/')

import sklearn
print sklearn.__version__

0.17

现在，我可以成功地执行以下操作而不会出错：

^{pr2}$