CODE EXAMPLE FOR PYTHON

levenshtein distance

def levenshtein(a, b):
    m = [[*range(len(a) + 1)] for _ in range(len(b) + 1)]
    for i in range(len(b) + 1):
        m[i][0] = i
    for i in range(1, len(b) + 1):
        for j in range(1, len(a) + 1):
            m[i][j] = min(m[i-1][j] + 1, m[i][j-1] + 1, m[i-1][j-1] + (b[i-1] != a[j-1]))
    return m[-1][-1]