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PytorchのConv2Dのweightプロパティを変更しようとしたらエラーが出た話

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環境

Windows10
Python 3.7.7
torch 1.8.0

状況

torchで畳み込みをするとき重みを直接設定しようとするとRuntimeError: a view of a leaf Variable that requires grad is being used in an in-place operation.というエラーが出る

エラーが出たコード

import torch
import torch.nn as nn

m = nn.Conv2d(1, 1, 2, stride=1, bias=False)
m.weight[0, 0, 0, 0] = 1
m.weight[0, 0, 0, 1] = 2
m.weight[0, 0, 1, 0] = 3
m.weight[0, 0, 1, 1] = 4

修正後のコード

import torch
import torch.nn as nn

m = nn.Conv2d(1, 1, 2, stride=1, bias=False)
m.weight.data[0, 0, 0, 0] = 1
m.weight.data[0, 0, 0, 1] = 2
m.weight.data[0, 0, 1, 0] = 3
m.weight.data[0, 0, 1, 1] = 4

weightのdataプロパティにアクセスするようにしてあげれば、エラーがでなくなった。

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