Pytorch installation - CPU version

Pytorch install ,pip Keep making mistakes , ok , I choose conda. I tried the simple installation method given by the official, but I still had problems , Then use the source code to install . At first, the source code was installed with ubuntu12, There are always the following errors ：

error: command 'gcc' failed with exit status 1

About this mistake , I've been looking for it for a long time , No solution was found .

Then I reinstalled ubuntu16 Source code installation , Can't , Everything is for learning .

First installation Anaconda, I am using python2.7 Of , So the installation is Anaconda2

1、bash Anaconda2-5.0.1-Linux-x86_64.sh

2、source ~/.bashrc 

Source code installation ：

export CMAKE_PREFIX_PATH=/home/xiaofeng/anaconda2/bin （ This folder is mine anaconda Of bin The location of the file , Everyone's is different ）

export NO_CUDA=1（ I installed CPU Version of ）

conda install numpy pyyaml mkl setuptools cmake cffi（ Installation dependency ）

 

If appear ：CondaIOError: Missing write permissions in: /home/xiaofeng/anaconda2

Follow the prompts to run ：conda create -n my_root --clone="/home/xiaofeng/anaconda2"

Then follow this prompt ：

#To activate this environment, use:

# > source activate my_root

#

# To deactivate an active environment, use:

# > source deactivate

function ource activate my_root

And then it runs again conda install numpy pyyaml mkl setuptools cmake cffi

 

clone --recursive https://github.com/pytorch/pytorch （ Download the source code ）

cd ./pytorch （ Enter the downloaded folder ）

python setup.py install （ Execution and installation , Do not use sudo install , If you are prompted that the folder does not have permission , adopt chmod solve .）

After installation import torch Have a try , If you can import , It means that .

I import torch When something goes wrong , Import failed

ImportError: No module named _C

The solution to this problem ： Don't just pytorch Import under the source file of , Change a folder .

It's mentioned here https://github.com/pytorch/pytorch/issues/7

 

I also encountered a situation , The installation is successful , In the folder /usr/local/lib/python2.7/dist-packages You can also see that torch file , You can import under the folder , But there will be errors in importing under other asking prices ImportError: No module named torch. Finally found , adopt sudo Just do it .

 

install torchvision

pip install torchvision

error ：

RuntimeError: PyTorch does not currently provide packages for PyPI (see status at https://github.com/pytorch/pytorch/issues/566

Go to the website it prompts , A solution has been found . as follows ：

pip install no-deps torchvision

I don't know yet torchvision The role of , Anyway, I installed it first .

Don't bother the original words of the great God ：“PyTorch Two modules will be installed , One is torch, One torchvision, torch Is the main module , Used to build neural networks , torchvision Is a secondary module , A database , There are also some trained neural networks waiting for you to use directly , such as (VGG, AlexNet, ResNet).”

 

After I install it, run the source code of don't bother God , There's a problem ： say pytorch was compiled without numpy support. But I ran it before conda install numpy pyyaml mkl setuptools cmake cffi

In the end, the problem was solved , The main problem is that I encountered errors when installing through the source code ：error: could not create '/home/xiaofeng/anaconda2/lib/python2.7/site-packages/torch': Permission denied
Then I run sudo python setup.py install To install . result torch Installed by default in my ubuntu System native python2.7 Folder （/usr/local/lib/python2.7/dist-packages/） below , So I always need to pass before executing the program sudo To execute , Otherwise, the prompt cannot be found torch Module . and numpy pyyaml mkl setuptools cmake cffi These dependencies are installed in anaconda2 Under the folder .anaconda It also includes a python2.7. If I don't pass sudo To execute the program , The default is anaconda In the installation of python2.7 So this creates a problem ：sudo To execute the program , The default system comes with python2.7, Tips torch Dependency of is not installed , If it doesn't go through sudo To execute the program , The default is anaconda Band python2.7 , Hint not found torch modular . I finally re installed through the source code pytorch, of no avail sudo direct python setup.py install. Prompt that the folder does not have permission , I use chmod To solve the .