如何在曲线图中找到给定y值对应的x值

def find_x_value(curve_data, target_y):
    n = len(curve_data)
    left = 0
    right = n - 1

    while left <= right:
        mid = (left + right) // 2
        x = curve_data[mid][0]
        y = curve_data[mid][1]

        if y == target_y:
            return x
        elif y < target_y:
            left = mid + 1
        else:
            right = mid - 1

    # 如果找不到完全匹配的y值，则进行线性插值
    if left > 0 and left < n:
        x1 = curve_data[left - 1][0]
        y1 = curve_data[left - 1][1]
        x2 = curve_data[left][0]
        y2 = curve_data[left][1]

        slope = (y2 - y1) / (x2 - x1)
        x = x1 + (target_y - y1) / slope
        return x

    return None