pip install scons
If you are not to run
scons from command line, check that Python scripts directory is added to PATH for your installation.
If you want to play with API,
import SCons from Python won't work, because SCons 2.5.x and below allows to install multiple versions side-by-side. This was needed to switch between different SCons versions during development and troubleshooting. Now the more common way for this is to use
virtualenv or just run it from source.