LDFLAGS: -L/usr/local/opt/freetype/lib CPPFLAGS: -I/usr/local/opt/freetype/include
LDFLAGS="-L/usr/local/opt/freetype/lib -L/usr/local/opt/libpng/lib" CPPFLAGS="-I/usr/local/opt/freetype/include -I/usr/local/opt/libpng/include -I/usr/local/opt/freetype/include/freetype2" sudo pip install matplotlib