def generate_dataset(filename, outputfilename):
data = _read_dataframe(filename)<EOL>_hfd5_from_dataframe(data, outputfilename)<EOL>
Generates a hdf5 reddit datasetfile from the raw datafiles found at:
    https://www.reddit.com/r/redditdev/comments/dtg4j/want_to_help_reddit_build_a_recommender_a_public/

    You shouldn't have to run this yourself, and can instead just download the
    output using the 'get_reddit' funciton.