py-install.sh

# install brew
ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"
brew tap homebrew/versions
brew update
brew upgrade

# this will install 2 versions of Python
brew install python     # 2.7: python, pip
brew install python3    # 3.5: python3, pip3


# python 2.7
# =============

python
# if you see this in your shell, let's move on
# Python 2.7.11 (default, Jan 22 2016, 08:29:18) 
# [GCC 4.2.1 Compatible Apple LLVM 7.0.2 (clang-700.1.81)] on darwin
# Type "help", "copyright", "credits" or "license" for more information.

# view the list of installed packages
pip list
# install what you need
pip install ipython 
pip install jupyter
pip install scikit-learn
pip install scikit-image
pip install numpy matplotlib
pip install sklearn
pip install scipy
# update packages that were already installed
pip install pandas --upgrade


# python 3.5
# =============

python3
# if you see this in your shell, let's move on
# Python 3.5.1 (default, Jan 22 2016, 08:54:32) 
# [GCC 4.2.1 Compatible Apple LLVM 7.0.2 (clang-700.1.81)] on darwin
# Type "help", "copyright", "credits" or "license" for more information.

# view the list of installed packages
pip3 list
# install what you need
pip3 install ipython 
pip3 install jupyter
pip3 install scikit-learn
pip3 install scikit-image
pip3 install numpy matplotlib
pip3 install sklearn
pip3 install scipy
# update packages that were already installed
pip3 install pandas --upgrade

# finally
brew cleanup