遍历字典的 values()

Question

我试图通过使用 for 循环来标记字典的每个值，但出现错误：'float' object 不可迭代。 我的代码是：

for doc, answers in answers.items():
    for answer in answers:
        if doc not in tokenized_answers:
            tokenized_answers[doc] = [tokenize(answer, tokenizer)]
        else:
            tokenized_answers[doc].append(tokenize(answer, tokenizer))

它显示错误：for answer in answers

我如何遍历 dict.values() 的值？

Answer 1

for doc, something_other_than_answers in answers.items():
   ...

Answer 2

看起来您的答案之一不是可迭代的，以避免错误并仅在可迭代对象上运行，您可以尝试除了检查 TypeError

 for doc, answers_items in answers.items():
    try: 
        for answer in answers_items:
            if doc not in tokenized_answers:
                tokenized_answers[doc] = [tokenize(answer, tokenizer)]
            else:
                tokenized_answers[doc].append(tokenize(answer, tokenizer))
    except TypeError:
        continue

这将跳过 for 循环中的答案值，以防它不是像 float 这样的可迭代对象。