pytorch將cpu訓練好的模型參數load到gpu上，或者gpu->cpu上

假設我們只保存了模型的參數(model.state_dict())到文件名為modelparameters.pth, model = Net()

1. cpu -> cpu或者gpu -> gpu:

checkpoint = torch.load('modelparameters.pth')

model.load_state_dict(checkpoint)

2. cpu -> gpu 1

torch.load('modelparameters.pth', map_location=lambda storage, loc: storage.cuda(1))

3. gpu 1 -> gpu 0

torch.load('modelparameters.pth', map_location={'cuda:1':'cuda:0'})

4. gpu -> cpu

torch.load('modelparameters.pth', map_location=lambda storage, loc: storage)