for info in infos: TypeError: 'NoneType' object is not iterable
时间: 2024-02-25 22:48:16 浏览: 17
这个错误通常是因为 `infos` 变量的值为 `None`,而 `None` 是不可迭代的。你需要检查一下 `infos` 变量的赋值语句,看看是否有可能出现赋值为 `None` 的情况。
如果你确定 `infos` 变量不应该为 `None`,那么你可以在使用 `infos` 变量之前添加一个判断语句,例如:
```python
if infos is not None:
for info in infos:
# do something with info
else:
# handle the case where infos is None
```
相关问题
infos = html['data']['items'] TypeError: 'NoneType' object is not subscriptable
This error occurs when trying to access a key or index of an object that is None. In this case, it appears that the object `html['data']['items']` is None, meaning it does not have any values to subscript.
To solve this error, you should check if the object `html['data']['items']` is None before trying to access its values. You can use an if statement to check if the object is not None, and only access its values if it is not None.
For example:
```
if html['data']['items'] is not None:
infos = html['data']['items']
# access values of infos here
else:
# handle case where html['data']['items'] is None
```
for(auto& iter : audio_input_infos)
这是一个使用范围-based for 循环遍历容器 `audio_input_infos` 的代码段。`auto` 关键字用于自动推断迭代器的类型,`&` 表示引用,`iter` 是循环变量。
这种循环方式可以方便地遍历容器的所有元素,而不需要手动管理迭代器的起始和结束条件。在每次循环迭代中,`iter` 会依次指向容器中的每个元素,可以通过 `iter` 进行读取或修改操作。