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]
或
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))