Python 如何修复：TypeError 'tuple' 对象不支持项目分配
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How to fix a : TypeError 'tuple' object does not support item assignment
提问by Pro-grammer
The following fragment of code from this tutorial: http://www.raywenderlich.com/24252/beginning-game-programming-for-teens-with-python
本教程中的以下代码片段：http: //www.raywenderlich.com/24252/beginning-game-programming-for-teens-with-python
for badguy in badguys:
if badguy[0]<-64:
badguys.pop(index)
badguy[0]-=7
index+=1
for badguy in badguys:
screen.blit(badguyimg, badguy)
is giving me a :
正在给我一个：
TypeError: 'tuple' object does not support item assignment
类型错误：“元组”对象不支持项目分配
I understand that this could be becuse badguyis a tuple. This means it is immutable(you can not change its values) Ive tried the following:
我知道这可能是因为badguy是一个元组。这意味着它是不可变的（你不能改变它的值）我尝试了以下方法：
t= list(badguy)
t[0]= t[0]-7
i+=1
I converted the tuple to a list so we can minus 7. But in the game nothing happens.
我将元组转换为一个列表，这样我们就可以减去 7。但在游戏中什么也没有发生。
Does any one know what I could do?
有谁知道我能做什么？
Thanks.
谢谢。
采纳答案by inspectorG4dget
Change this
改变这个
badguy[0]-=7
into this
进入这个
badguy = list(badguy)
badguy[0]-=7
badguy = tuple(badguy)
Alternatively, if you can leave badguyas a list, then don't even use tuples and you'll be fine with your current code (with the added change of using lists instead of tuples)
或者，如果您可以保留badguy为 a list，那么甚至不使用元组，您当前的代码就可以了（增加了使用列表而不是元组的更改）
回答by SethMMorton
Another solution is instead of
另一种解决方案是代替
badguy[0] -= 7
to do
去做
badguy = (badguy[0] - 7,) + badguy[1:]
This creates a new tuple altogether with the updated value in the zeroth element.
这与第零个元素中的更新值一起创建了一个新元组。
回答by SSR
You can do a np.copy() and work with her.
你可以做一个 np.copy() 并与她一起工作。
badguy_copy = np.copy(badguy)
