报错解决：RuntimeError: expected scalar type Long but found Float

报错信息

RuntimeError: expected scalar type Long but found Float

原因

nn.Linear需要作用于浮点数，这里可能输入了整数类型的张量作为参数。

代码示例

错误版

import torch
import torch.nn as nn
a = torch.tensor([1,2,3,4])
lin = nn.Linear(4,2)
b = lin(a)
print(b)

报错：

改正

import torch
import torch.nn as nn
a = torch.tensor([1,2,3,4])
lin = nn.Linear(4,2)
b = lin(a.float())
print(b)

把a转为float,结果为：

tensor([-1.1703,  0.0518], grad_fn=<AddBackward0>)