如何访问 Python 中 groupcollide() 返回的列表中的每个项目属性？

Question

# Variable containing a list of collided objects.
collisions = pygame.sprite.groupcollide(bullets, aliens, True, True)

# I want to access on of the collided objects (aliens) attribute (aliens.points)

if collisions:
    for aliens in collisions.values():
        print(aliens)
        # print(collisions.values()) returns: dict_values([[<Alien Sprite(in 0 groups)>]])
        print(aliens.points) # doesnt work

当前终端输出：

[<Alien Sprite(in 0 groups)>]

终端错误输出：

AttributeError: 'list' object has no attribute 'points'

Answer 1

groupcollide 是这样工作的：

Every Sprite inside group1 is added to the return dictionary. The value for each item is the list of Sprites in group2 that intersect.

所以你可以做到

for bullet in collisions: # each bullet
    for alien in collision[bullet]: # each alien that collides with that bullet
        print(alien.points)

如何访问 Python 中 groupcollide() 返回的列表中的每个项目属性？

How to access each items attributes in a list returned by groupcollide() in Python?

python

pygame

collision