首先到官网下载安装 python ，之后下载setuptools 进行安装。

 

'python' 不是内部或外部命令 

可运行 set PATH=%PATH%;C:\Python34

安装完成之后，运行easy_install virtualenv

 

之后根据

Scikit-learn requires:

• Python (>= 2.6 or >= 3.3),
• NumPy (>= 1.6.1),
• SciPy (>= 0.9).

安装 easy_install numpy

安装 easy_install SciPy 

完成之后即可运行 easy_install scikit-learn 

C:\Python34\Scripts>easy_install scikit-learnSearching for scikit-learnReading https://pypi.python.org/simple/scikit-learn/Reading http://scikit-learn.orgReading http://scikit-learn.sourceforge.netDownload error on http://scikit-learn.sourceforge.net: timed out -- Some packages may not be found!Reading http://sourceforge.net/projects/scikit-learn/files/Best match: scikit-learn 0.16.1Downloading https://pypi.python.org/packages/3.4/s/scikit-learn/scikit-learn-0.16.1.win32-py3.4.exe#md5=28dc57e538e074748832d18fb8a93e88Processing scikit-learn-0.16.1.win32-py3.4.execreating 'C:\Users\ADMINI~1\AppData\Local\Temp\easy_install-qg8zl565\scikit_learn-0.16.1-py3.4-win32.egg' and adding 'C:\Users\ADMINI~1\AppData\Local\Temp\easy_install-qg8zl565\scikit_learn-0.16.1-py3.4-win32.egg.tmp' to itcreating c:\python34\lib\site-packages\scikit_learn-0.16.1-py3.4-win32.eggExtracting scikit_learn-0.16.1-py3.4-win32.egg to c:\python34\lib\site-packagesAdding scikit-learn 0.16.1 to easy-install.pth fileInstalled c:\python34\lib\site-packages\scikit_learn-0.16.1-py3.4-win32.eggProcessing dependencies for scikit-learnFinished processing dependencies for scikit-learn

  如按照此方式操作依然不行

>>> import sklearnTraceback (most recent call last):  File "
     
      ", line 1, in 
      
           import sklearnImportError: No module named 'sklearn'
      
     

可在 https://github.com/scikit-learn/scikit-learn 下载

解压到 C盘目录下 运行 python setup.py install 即可。