'list' object has no attribute 'len'

这个错误是因为在Python中，列表的长度属性是`len()`而不是`list.len()`。因此，如果你尝试使用`list.len()`来获取列表的长度，就会出现'list' object has no attribute 'len'的错误。正确的方法是使用`len()`函数来获取列表的长度。以下是一个例子：

my_list = [1, 2, 3, 4, 5]
print(len(my_list)) # 输出：5

相关问题

list' object has no attribute 'len'

The error message "list' object has no attribute 'len'" indicates that you are trying to use the attribute `len` on a list object, which is not valid. In Python, the correct way to get the length of a list is by using the built-in `len()` function.

Here's an example of how to use `len()` to get the length of a list:

my_list = [1, 2, 3, 4, 5]
length = len(my_list)
print(length)  # Outputs: 5

Make sure you are using `len()` correctly and that the variable you are applying it to is indeed a list.

list object has no attribute size

这个错误通常是因为你正在尝试使用一个列表对象的size属性，但是列表对象并没有size属性。在Python中，列表对象有一个内置的len()函数来获取列表的长度，而不是使用size属性。因此，你需要将input.size()替换为len(input)来解决这个问题。

下面是一个示例代码：

import torch
from torchsummary import summary

model = YourModel()
input_size = (3, 224, 224)
device = torch.device('cuda' if torch.cuda.is_available() else 'cpu')
model = model.to(device)
summary(model, input_size=input_size)