~linuxgoose/linguistics-robin

ref: efe2269fb215344e2199c1301f18d3652e774fb9 linguistics-robin/pyphonetics/distance_metrics/hamming.py -rw-r--r-- 524 bytes
efe2269f — Ilias Koutsakis general updates 5 years ago 
                                                                                
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from ..exceptions import WrongLengthException


def hamming_distance(word1, word2):
    """
    Computes the Hamming distance.

    [Reference]: https://en.wikipedia.org/wiki/Hamming_distance
    [Article]: Hamming, Richard W. (1950), "Error detecting and error correcting codes",
        Bell System Technical Journal 29 (2): 147–160
    """
    from operator import ne
    if len(word1) != len(word2):
        raise WrongLengthException('The words need to be of the same length!')

    return sum(map(ne, word1, word2))