Check that the dataset helpers make runs successfully.

    import os

    import subprocess

    path = os.path.abspath(os.path.dirname(__file__))

    subprocess.run(['make', '-C', path]) 

    ret = subprocess.run(['make', '-C', path])

    if ret.returncode != 0:

        print("Making C++ dataset helpers module failed, exiting.")

        import sys

        sys.exit(1)

def build_training_sample(sample,