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dustinboswell/shingleprints.py

Last active December 2, 2021 20:15
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Computing shingleprints for a document
Raw
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)]
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