python 两线交点

两线的交点可以通过计算两条线段的斜率和截距来得到。以下是一个计算交点的Python代码示例：

def line_intersection(line1, line2):
    x1, y1, x2, y2 = line1
    x3, y3, x4, y4 = line2
    
    if (x2 - x1) == 0:
        k1 = None
        b1 = 0
    else:
        k1 = (y2 - y1) / (x2 - x1)
        b1 = y1 - x1 * k1
    
    if (x4 - x3) == 0:
        k2 = None
        b2 = 0
    else:
        k2 = (y4 - y3) / (x4 - x3)
        b2 = y3 - x3 * k2

    if k2 == None:
        x = x3
    else:
        x = (b2 - b1) / (k1 - k2)
    
    y = k1 * x + b1
    
    return [x, y]

line1 = [1, 1, -1, -1]
line2 = [-1, 1, 1, -1]
intersection = line_intersection(line1, line2)
print(intersection)

交点的坐标会被打印出来。以上代码可以计算出两条线段line1和line2的交点。