'builtin_function_or_method' 对象不可迭代

Question

我正在尝试从这个 json 中打印所有汽车：

{
    "stuff": [
        {
           "car" : 1,
            "color" : "blue"
        },
        {
            "bcarus" : 2,
            "color" : "red"
        }
     ], 
}

In my Serializer I access the data like this....

stuff = self.context.get("request").data.stuff

But when I do the following...

        for item in stuff:
            print(item)

I get he error:

'builtin_function_or_method' object is not iterable

Why do I get this error? How can I access stuff in a for loop?

When I do print(self.context.get("request").data.stuff) I get <built-in method items of dict object at 0x105225050> which I assumed print the stuff instead.

Answer 1

stuff ends up a method of function so you would need to call it:

    for item in stuff():
        print(item)

Which based on your comment is the dict.items.

So you can unpack:

 for k,v  in stuff():
     print(k,v)

Or just call when you assign:

 stuff = self.context.get("request").data.stuff()

 for k,v  in stuff:
     print(k,v)