(n, m)
return math.sqrt((n[0] - m[0]) ** 2 + (n[1] - m[1]) ** 2)
helper for straightness
helper for straightness
helper for straightness
def _euclidean(n, m):
    """helper for straightness"""
    return math.sqrt((n[0] - m[0]) ** 2 + (n[1] - m[1]) ** 2)
def _euclidean ( n , m ) : return math . sqrt ( ( n [ 0 ] - m [ 0 ] ) ** 2 + ( n [ 1 ] - m [ 1 ] ) ** 2 )