Computing shingleprints for a document

shingleprints.py

def min_max_hashes(text, window=60):
    hashes = [murmurhash(text[i:i+window]) for i in range(len(text)-window+1)]
    return [min(hashes), max(hashes)]

def shingleprints(text):
    min1, max1 = min_max_hashes(text[0:len(text)/2])
    min2, max2 = min_max_hashes(text[len(text)/2:])
    # combine pairs, using your favorite hash-value combiner
    return [hash_combine(min1, min2),
            hash_combine(min1, max2),
            hash_combine(max1, min2),
            hash_combine(max1, max2)]