pytorch艰难安装路

本文主要是介绍pytorch艰难安装路，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

pytorch安装@pytorch

国庆买了新电脑，需要重新装pytorch，之前的电脑安装得很顺利，现在却是不论是pip install torch或者去官网
找命令pip3.7 install torch==1.2.0+cpu torchvision==0.4.0+cpu -f https://download.pytorch.org/whl/torch_stable.html 都装不了，给我的问题反馈是
一开始用的cmd装，后来用pycharm，发现不管用什么装本质都是一样的问题，网上找了很久很久也找不到方法解决。

昨晚奋战到凌晨查了半天，想用whl文件装，查了下我朋友给我装的python是32位的，但我电脑是64位的，不知道有没有影响，但是pytorch的whl文件没有32位的！！！我就很怀疑是不是这个问题，查了下tensorflow也没有32bit的（毕竟先出来的tf，大家的交流比较多），于是连夜卸载，安装了3.7.4的64位的python.

C:\Users\littlebigus>python
Python 3.7.4 (tags/v3.7.4:e09359112e, Jul  8 2019, 20:34:20) [MSC v.1916 64 bit (AMD64)] on win32
Type "help", "copyright", "credits" or "license" for more information.

继续装pytorch

做了以下工作：
1. pycharm解释器换成了昨天安装的3.7.4的解释器
2. 妄想在pycharm里重新装，结果还是昨天的问题

ModuleNotFoundError: No module named ‘tools.nnwrap’

3.简单粗暴去cmd再试一次，但这次用的pip换了

C:\Users\littlebigus>pip3.7 install torch

然后！！！还是不可，同样的问题’tools.nnwrap’问题（我真的不知道为什么我应该如何解决）

4.再试一次官网的码，来来来copy（话说这几天ctrl+c/v快被我锤烂了）

C:\Users\littlebigus>pip3.7 install torch==1.2.0+cpu torchvision==0.4.0+cpu -f https://download.pytorch.org/whl/torch_stable.html

然后！！！！！！！！！！！！！！！！！！！！！！！！！

Looking in links: https://download.pytorch.org/whl/torch_stable.html
Collecting torch==1.2.0+cpuDownloading https://download.pytorch.org/whl/cpu/torch-1.2.0%2Bcpu-cp37-cp37m-win_amd64.whl (89.4MB)|████████████████████████████████| 89.4MB 211kB/s
Collecting torchvision==0.4.0+cpuDownloading https://download.pytorch.org/whl/cpu/torchvision-0.4.0%2Bcpu-cp37-cp37m-win_amd64.whl (684kB)|████████████████████████████████| 686kB 139kB/s
Requirement already satisfied: numpy in d:\python3.7.4\lib\site-packages (from torch==1.2.0+cpu) (1.17.2)
Collecting pillow>=4.1.1 (from torchvision==0.4.0+cpu)Downloading https://files.pythonhosted.org/packages/14/db/f4c72818297d4d92083c1b3d3404efdb6b2734bea11c0950cfc48b832021/Pillow-6.2.0-cp37-cp37m-win_amd64.whl (2.0MB)|█████                           | 307kB 2.9kB/s eta 0:09:46ERROR: Exception:
Traceback (most recent call last):

虽然不出意料又不行了，但是这个error我经常遇到！！！不就是网不好嘛，来来来，再来一遍

C:\Users\littlebigus>pip3.7 install torch==1.2.0+cpu torchvision==0.4.0+cpu -f https://download.pytorch.org/whl/torch_stable.html
Looking in links: https://download.pytorch.org/whl/torch_stable.html
Collecting torch==1.2.0+cpuUsing cached https://download.pytorch.org/whl/cpu/torch-1.2.0%2Bcpu-cp37-cp37m-win_amd64.whl
Collecting torchvision==0.4.0+cpuUsing cached https://download.pytorch.org/whl/cpu/torchvision-0.4.0%2Bcpu-cp37-cp37m-win_amd64.whl
Requirement already satisfied: numpy in d:\python3.7.4\lib\site-packages (from torch==1.2.0+cpu) (1.17.2)
Collecting six (from torchvision==0.4.0+cpu)Downloading https://files.pythonhosted.org/packages/73/fb/00a976f728d0d1fecfe898238ce23f502a721c0ac0ecfedb80e0d88c64e9/six-1.12.0-py2.py3-none-any.whl
Collecting pillow>=4.1.1 (from torchvision==0.4.0+cpu)Downloading https://files.pythonhosted.org/packages/14/db/f4c72818297d4d92083c1b3d3404efdb6b2734bea11c0950cfc48b832021/Pillow-6.2.0-cp37-cp37m-win_amd64.whl (2.0MB)|████████████████████████████████| 2.0MB 504kB/s
Installing collected packages: torch, six, pillow, torchvision
Successfully installed pillow-6.2.0 six-1.12.0 torch-1.2.0+cpu torchvision-0.4.0+cpu

我都要感动的哭了

测试一下

C:\Users\littlebigus>python
Python 3.7.4 (tags/v3.7.4:e09359112e, Jul  8 2019, 20:34:20) [MSC v.1916 64 bit (AMD64)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import torch
>>> print(torch.cuda.is_available())
False
>>> exit()