已安装torch但无法安装auto-gptq，提示需先安装torch

问题描述 #

我尝试在本地安装auto-gptq时遇到以下错误：

Collecting auto-gptq
  Using cached auto_gptq-0.3.2.tar.gz (63 kB)
  Installing build dependencies ... done
  Getting requirements to build wheel ... error
  error: subprocess-exited-with-error

  × Getting requirements to build wheel did not run successfully.
  │ exit code: 4294967295
  ╰─> [1 lines of output]
      torch is not installed, please install torch first!
      [end of output]

  note: This error originates from a subprocess, and is likely not a problem with pip.
error: subprocess-exited-with-error

× Getting requirements to build wheel did not run successfully.
│ exit code: 4294967295
╰─> See above for output.

note: This error originates from a subprocess, and is likely not a problem with pip.

我已安装torch，执行安装命令时显示：

PS > C:\...\python.exe -m pip install torch        
Requirement already satisfied: torch in c:\... (2.0.1)
Requirement already satisfied: filelock in c:\... (from torch) (3.12.2)
Requirement already satisfied: typing-extensions in c:\... (from torch) (4.7.1)
Requirement already satisfied: sympy in c:\... (from torch) (1.12)
Requirement already satisfied: networkx in c:\... (from torch) (3.1)
Requirement already satisfied: jinja2 in c:\... (from torch) (3.1.2)
Requirement already satisfied: MarkupSafe>=2.0 in c:\... (from jinja2->torch) (2.1.3)
Requirement already satisfied: mpmath>=0.19 in c:\... (from sympy->torch) (1.3.0)

但仍出现上述错误，请问这是为什么？

可能的原因及解决方法 #

• Python环境不匹配：安装auto-gptq时使用的Python环境，与安装torch的环境不一致。比如默认终端调用的是系统Python，但torch装在虚拟环境里。解决方式：激活torch所在的虚拟环境后再执行安装命令，或者直接用torch所在的Python解释器运行安装：

  C:\...\python.exe -m pip install auto-gptq
  

  替换路径为你实际的Python可执行文件路径。

• 版本兼容性问题：auto-gptq 0.3.2对torch版本有特定要求，torch 2.0.1可能不在支持范围内。可以核对auto-gptq的版本兼容说明，要么升级/降级torch到兼容版本，要么安装对应兼容的auto-gptq版本。

• pip缓存干扰：pip缓存可能导致依赖检测失效。先清除缓存再重新安装：

  pip cache purge
  

  之后再执行auto-gptq的安装命令。

• CUDA依赖缺失：如果安装的是CPU版torch，但auto-gptq默认需要GPU版torch支持，也会触发该错误。确认安装的是带CUDA的torch版本，或者安装时指定auto-gptq的CPU兼容版本（如果官方支持）。

内容的提问来源于stack exchange，提问作者Daniel Burmester