qq_48983365的博客

import torchvision.datasets as datasets from torchvision import transforms,utils from torch.utils.data import dataloader,DataLoader trans = transforms.Compose([transforms.ToTensor(),transforms.Resize((48,48))]) data = datasets.ImageFolder(root=r'E:\pyth

Microsoft Windows [版本 10.0.19043.1645] (c) Microsoft Corporation。保留所有权利。 C:\Users\ymd>python Python 3.8.5 (default, Sep 3 2020, 21:29:08) [MSC v.1916 64 bit (AMD64)] :: Anaconda, Inc. on win32 Warning: This Python interpreter is in a conda environmen

两个数组 a 和 b 形状相同，即满足 a.shape == b.shape，那么 a*b 的结果就是 a 与 b 数组对应位相乘，相加， 当维度不同时，广播机制 import numpy as np a = np.array([[0,1,2,3], [1,1,2,3], [2,1,2,3], [3,1,2,3]]) b = np.array([0,1,2,3]) c = np.array([[0,1,2,3]]) print(a+ b) print(a+c) 结果 [[0 2 4 6] [1 2 4 6]