def joke_distance(jokeOneID, jokeTwoID, sqlContext, p=2):
jokeOneTopics = sqlContext.sql(
"SELECT topicDistribution FROM jokes WHERE jokeID = {jokeOneID}".
format(jokeOneID=jokeOneID))
jokeTwoTopics = sqlContext.sql(
"SELECT topicDistribution FROM jokes WHERE jokeID = {jokeTwoID}".
format(jokeTwoID=jokeTwoID))
joke_disparity = jokeOneTopics.subtract(jokeTwoTopics)
return Vectors.norm(joke_disparity.rdd.first().topicDistribution,
p)**(1 / p)
