在我的函数中,我有:

        """
        Iterates 300 times as attempts, each having an inner-loop
        to calculate the z of a neighboring point and returns the optimal
        """

        pointList = []
        max_p = None

        for attempts in range(300):

            neighborList = ( (x - d, y), (x + d, y), (x, y - d), (x, y + d) )

            for neighbor in neighborList:
                z = evaluate( neighbor[0], neighbor[1] )
                point = None
                point = Point3D( neighbor[0], neighbor[1], z)
                pointList += point
            max_p = maxPoint( pointList )
            x = max_p.x_val
            y = max_p.y_val
        return max_p

我没有迭代我的类实例point,但是我仍然得到:
    pointList += newPoint
TypeError: 'Point3D' object is not iterable

最佳答案

问题是这一行:

pointList += point

pointList是一个list实例,point是一个Point3D实例。只能将另一个iterable添加到iterable。
你可以用这个来解决它:
pointList += [point]


pointList.append(point)

在您的情况下,不需要将None分配给point。也不需要将变量绑定到新点。您可以将其直接添加到列表中,如下所示:
pointList.append(Point3D( neighbor[0], neighbor[1], z))

10-06 13:20