Question

我在虚拟环境中使用python2.7。我尝试在python2.7中安装pytorch，但出现以下错误：

UnsatisfiableError: The following specifications were found
to be incompatible with the existing python installation in your environment:

  - pytorch-cpu -> python[version='3.5.*|3.6.*']
  - pytorch-cpu -> python[version='>=3.5,<3.6.0a0|>=3.6,<3.7.0a0|>=3.7,<3.8.0a0']

If python is on the left-most side of the chain, that's the version you've asked for.
When python appears to the right, that indicates that the thing on the left is somehow
not available for the python version you are constrained to.  Your current python version
is (python=2.7).  Note that conda will not change your python version to a different minor version
unless you explicitly specify that.

The following specifications were found to be incompatible with each other:



Package wheel conflicts for:
python=2.7 -> pip -> wheel
pytorch-cpu -> python[version='>=3.6,<3.7.0a0'] -> pip -> wheel
Package vc conflicts for:
python=2.7 -> sqlite[version='>=3.27.2,<4.0a0'] -> vc[version='14.*|>=14,<15.0a0|>=14.1,<15.0a0']
python=2.7 -> vc[version='9.*|>=9,<10.0a0']
pytorch-cpu -> numpy[version='>=1.11'] -> vc[version='14|14.*|>=14,<15.0a0']
pytorch-cpu -> vc[version='>=14.1,<15.0a0']
Package cffi conflicts for:
pytorch-cpu -> cffi
pytorch-cpu -> python[version='>=3.6,<3.7.0a0'] -> pip -> requests -> urllib3[version='>=1.21.1,<1.25'] -> cryptography[version='>=1.3.4'] -> cffi[version='>=1.7']
python=2.7 -> pip -> requests -> urllib3[version='>=1.21.1,<1.25'] -> cryptography[version='>=1.3.4'] -> cffi[version='>=1.7']
Package pip conflicts for:
python=2.7 -> pip
pytorch-cpu -> python[version='>=3.6,<3.7.0a0'] -> pip
Package setuptools conflicts for:
python=2.7 -> pip -> setuptools
pytorch-cpu -> python[version='>=3.6,<3.7.0a0'] -> pip -> setuptools
Package msgpack-python conflicts for:
python=2.7 -> pip -> cachecontrol -> msgpack-python
pytorch-cpu -> python[version='>=3.6,<3.7.0a0'] -> pip -> cachecontrol -> msgpack-python

我尝试了conda安装pytorch-cpu -c pytorch和link（https://pytorch.org/get-started/locally/）。但这是行不通的。那么我应该如何在python version2.7中安装割炬？我想安装pytorch cpu版本。

plz帮助：）

Answer 1

先用python2.7安装conda：
conda 安装 pytorch torchvision torchaudio cpuonly -c pytorch

然后激活环境：
conda 激活 python2

然后安装pytorch：
conda 安装 pytorch torchvision torchaudio cpuonly -c pytorch

检查确认：

python    
import torch
print(torch._ _version_ _)

Answer 2

似乎pytorch尝试安装一些需要python> = 3.6版本的软件包。

Package wheel conflicts for:
python=2.7 -> pip -> wheel
pytorch-cpu -> python[version='>=3.6,<3.7.0a0'] -> pip -> wheel

您必须在命令中指定要安装pytorch的python版本

Answer 3

这是PyTorch official download page

的链接

在这里，您可以根据您的环境和操作系统选择python版本（2.7）和CUDA（无）以及其他相关详细信息。

其他有用的链接：

Answer 4

对我来说，链接https://www.learnopencv.com/installing-deep-learning-frameworks-on-ubuntu-with-cuda-support/中的方法工作了。

这就是我的做法：

!pip install http://download.pytorch.org/whl/cu80/torch-0.2.0.post3-cp27-cp27mu-manylinux1_x86_64.whl

如何在python2.7中安装pytorch？

4 个答案: