def euclidean(c1, c2):
    """Square of the euclidean distance"""
    diffs = ((i - j) for i, j in zip(c1, c2))
    return sum(x * x for x in diffs)
def euclidean(c1, c2):
    """Square of the euclidean distance"""
    diffs = ((i - j) for i, j in zip(c1, c2))
    return sum(x * x for x in diffs)
Square of the euclidean distance