Installing Python libraries to work with scikit-learn

              I was trying to install scikit-learn and it had the following requirements /dependencies

            

              Python (>= 2.6 or >= 3.3),

                  NumPy (>= 1.6.1),  & SciPy (>= 0.9).

             As per the website, http://scikit-learn.org/stable/install.html they have suggested
             not to install it using yum.  Only option was using pip , but I have run into
             trouble using pip to install  numpy.  The moment I tried to upgrade numpy
             using pip it was  downgrading numpy to 1.1.1

  

                     After googling for a while I found a solution for this problem by using 

                        pip install -I numpy==1.6.1

                        pip install -I scipy==0.9.0

             Next install 'Development Tools' package using yum

                yum group install 'Development Tools' -y

             Last  install scikit-learn using

                   pip install scikit-learn