list(pool.map(weeks,week_similarities_helper))
def author_cosine_similarities_weekly(outfile, min_df=2 , included_subreddits=None, topN=500):
list(pool.map(weeks,week_similarities_helper))
def author_cosine_similarities_weekly(outfile, min_df=2 , included_subreddits=None, topN=500):