def match(self, queryWords, docWords):
words = self.sharedWords(queryWords, docWords)
idf = [self.invDocFreq(w) for w in words]
docVec = self.wordVector(words, docWords)
maxFreq = docVec.largest()
docVec = Vector([docVec[i] / maxFreq * idf[i]
for i in range(len(words))])
queryVec = self.wordVector(words, queryWords)
maxFreq = queryVec.largest()
queryVec = Vector([0 if idf[i] == 0 else \
(0.5 + (0 if maxFreq == 0 else 0.5*queryVec[i]/maxFreq)) \
* idf[i] for i in range(len(words))])
return queryVec.dot(docVec) / \
(queryVec.length() * docVec.length())
def test_dot_product(self): vec = Vector([1,2]) by = Vector([3,4]) dot = vec.dot(by) self.assertEqual(11, dot)
