import os

env = Environment(ENV=os.environ.copy())

env.Command(
    target=["isles.dat"],
    source=["books/isles.txt"],
    action=["python countwords.py books/isles.txt isles.dat"],
)

env.Command(
    target=["abyss.dat"],
    source=["books/abyss.txt"],
    action=["python countwords.py books/abyss.txt abyss.dat"],
)

env.Alias("dats", ["isles.dat", "abyss.dat"])