折腾了好长时间才安装好，主要是scipy的问题。
python - Installing SciPy and NumPy using pip - Stack Overflow
安装依赖
sudoapt-getinstall python3-dev
sudoapt-getinstall libblas-dev liblapack-dev libatlas-base-dev gfortran安装numpy和scipy
这两个库都是scikit-learn必须的，前一步的依赖几乎全都是为安装scipy作准备。pip install scipy
pip install numpy安装scikit-learn
官网的要求：- Python (>= 2.6 or >= 3.3),
- NumPy (>= 1.6.1),
- SciPy (>= 0.9).
pip install scikit-learnsuccess就可以在python里import试试看啦!参考：
Installing scikit-learn scikit-learn 0.16.1 documentationpython - Installing SciPy and NumPy using pip - Stack Overflow