Scikit learn conda update sklearn-不更新

我正在使用蟒蛇

conda --v 
conda 4.3.25

我正在尝试更新sklearn软件包。我按照这里的指示： . 当我尝试安装这些软件包时，它显示它正在安装sklearn 0.19

conda install scikit-learn
The following NEW packages will be INSTALLED:
numpy:        1.13.1-py27_0     
scikit-learn: 0.19.0-np113py27_0
scipy:        0.19.1-np113py27_0
Proceed ([y]/n)? y

但是，当我检查包版本时，它仍然显示0.15

import sklearn
sklearn.__version__
'0.15.2'

我进一步用python创建了环境

$conda create -n sklearn python=2.7 anaconda

它显示如下：

The following NEW packages will be INSTALLED:
scikit-image:       0.13.0-np112py27_0
scikit-learn:       0.18.1-np112py27_1

source activate sklearn

$python
Python 2.7.13 |Anaconda 4.4.0 (x86_64)| (default, Dec 20 2016, 23:05:08) 
[GCC 4.2.1 Compatible Apple LLVM 6.0 (clang-600.0.57)] 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
>>> import sklearn
>>> sklearn.__version__
'0.15.2'

此外，当我查看pycharm中的包时，我看到了15.2和19.1。请参阅附加的屏幕截图

如何解决这个问题？

---

我看到软件包被安装到文件夹中。/local/lib/python2.7/site-packages。Conda需要这样做吗？

我发现Conda软件包文件夹与pip安装文件夹存在冲突。我使用

导入系统

打印系统路径

并发现pip安装文件夹的优先级高于conda文件夹

---

删除pip安装文件夹解决了这个问题。

确保使用了正确的解释器（看起来不是这样）。是否使用了基于蟒蛇的python？有趣的是：如果是scipy，请检查版本并与0.19.1进行比较。>>>>scipy.\uuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuu。转到目录并删除。