tensor转成numpy

b = a.numpy()

import torch

a = torch.arange(5)
b = a.numpy()
print(a)
print(type(a))
print(b)
print(type(b))

numpy转成tensor

b = torch.tensor(a)

import torch
import numpy as np

a = np.ones(5)
b = torch.tensor(a)
print(a)
print(type(a))
print(b)
print(type(b))