conda update scikit-learn (also scipy and numpy)
<p>I think I have made a mess using pip install when I am supposed to use conda. As a result I couldn't update the scikit-learn package to the latest version. I uninstalled scikit-learn with both conda and pip, and then installed again using conda but now I have issue import sklearn:</p>

<pre><code>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 "&lt;stdin&gt;", line 1, in &lt;module&gt;
  File "/Users/bowang/anaconda/lib/python2.7/site-packages/sklearn/metrics/__init__.py", line 7, in &lt;module&gt;
    from .ranking import auc
ImportError: No module named ranking 
</code></pre>

<p>Also there seems to be confusions with which version of sklearn/numpy/scipy it actually uses:</p>

<pre><code>$ 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
</code></pre>

<p>Above shows I still can't update to the latest versions but:</p>

<pre><code>$ python
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
&gt;&gt;&gt; import scipy
&gt;&gt;&gt; scipy.__version__
'0.17.0'
&gt;&gt;&gt; import numpy
&gt;&gt;&gt; numpy.__version__
'1.11.0'
&gt;&gt;&gt; import sklearn
&gt;&gt;&gt; sklearn.__version__
'0.17.1'
</code></pre>

<p>Is there a way to clean up and resolve all the confusions here and allow me to update and thus use the latest versions of sklearn/numpy/scipy? Thanks!</p>