pytorch中的numel函数

1. numel函数用于获取tensor中一共包含多少个元素

import torch
x = torch.randn(3,3)
print("number elements of x is ",x.numel())
y = torch.randn(3,10,5)
print("number elements of y is ",y.numel())

输出：

number elements of x is  9
number elements of y is  150

27和150分别位x和y中各有多少个元素或变量

2. 统计模型参数量

num_params = sum(param.numel() for param in net.parameters())
print(num_params)