如何在Pytorch中使用for循环长度作为优化参数

编程问答 2022-06-13

问题描述

我正在尝试将循环的长度注册为优化参数，以便优化程序将自动调整循环的长度。

这是一个示例代码（实际问题比较复杂，但是您会明白的）：

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优化似乎不起作用，这是输出：

import torch

positive_iter = torch.tensor([10.0],requires_grad=True)
negative_iter = torch.tensor([20.0],requires_grad=True)

optimizer = torch.optim.Adam([positive_iter,negative_iter],lr=0.02,betas=(0.5,0.999))

for i in range(100):
    loss = torch.tensor([0.0],requires_grad=True)
    for g in range(int(positive_iter)):
        loss = loss + torch.rand(1)
    for d in range(int(negative_iter)):
        loss = loss - torch.rand(1) * 2

    loss = torch.abs(loss)
    loss.backward()
    optimizer.step()
    print(i,loss.item(),positive_iter.item(),negative_iter.item())

您能否建议如何使for循环长度成为优化参数。

谢谢

解决方法

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autogradoptimizationoptimizationpythonpytorch