AI-agent/08_demo_tensorboard/demo.py

import torch

# 创建一个 2*3 的全 0 张量
a = torch.zeros(2, 3)
print(a)

# 创建一个 2*3 的全 1 张量
b = torch.ones(2, 3)
print(b)
# 创建一个 2*3 的随机张量
c = torch.randn(2, 3)
print(c)

# 从 NumPy 数组创建张量
import numpy as np
numpy_array = np.array([[1,2],[3,4]])
tensor_from_numpy = torch.from_numpy(numpy_array)
print(tensor_from_numpy)

device  = torch.device("cuda" if torch.cuda.is_available() else "cpu")
d = torch.randn(2,3, device=device)
print(d)