Function to find intersection between two lines

intersection.py

def intersection(horizontal, vertical):
    # https://en.wikipedia.org/wiki/Line%E2%80%93line_intersection
    # Horizontal x y x y
    # Vertical x y x y
    # x1, y1, x2, y2, x3, y3, x4, y4
    # 0    1   2   3   0   1   2   3
    result = []

    x1, x2, x3, x4, y1, y2, y3, y4 = int(horizontal[0]), int(horizontal[2]), int(vertical[0]), int(vertical[2]), int(horizontal[1]), int(horizontal[3]), int(vertical[1]), int(vertical[3])

    xl1 = x1 - x2
    xl2 = x3 - x4
    yl1 = y1 - y2
    yl2 = y3 - y4

    c = xl1 * yl2 - yl1 * xl2

    # Finding the intersect
    a = x1 * y2 - y1 * x2
    b = x3 * y4 - y3 * x4

    x = (a * xl2 - b * xl1) / c
    y = (a * yl2 - b * yl1) / c

    result.append(x)
    result.append(y)

    return result