def make_fuzzy(word, max=1):
    """Naive neighborhoods algo."""
    # inversions
    neighbors = []
    for i in range(0, len(word) - 1):
        neighbor = list(word)
        neighbor[i], neighbor[i+1] = neighbor[i+1], neighbor[i]
        neighbors.append(''.join(neighbor))
    # substitutions
    for letter in string.ascii_lowercase:
        for i in range(0, len(word)):
            neighbor = list(word)
            if letter != neighbor[i]:
                neighbor[i] = letter
                neighbors.append(''.join(neighbor))
    # insertions
    for letter in string.ascii_lowercase:
        for i in range(0, len(word) + 1):
            neighbor = list(word)
            neighbor.insert(i, letter)
            neighbors.append(''.join(neighbor))
    if len(word) > 3:
        # removal
        for i in range(0, len(word)):
            neighbor = list(word)
            del neighbor[i]
            neighbors.append(''.join(neighbor))
    return neighbors
Naive neighborhoods algo.