M1 miniforge 中 import torch 出现ImportError

项目场景：

在mac上使用miniforge遇到了这个问题，找了很久

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问题描述

错误代码如下

Original error was: dlopen(/Users/user/miniforge3/envs/pth11env/lib/python3.9/site-packages/numpy/core/_multiarray_umath.cpython-39-darwin.so, 0x0002): Library not loaded: @rpath/libcblas.3.dylib
  Referenced from: /Users/user/miniforge3/envs/pth11env/lib/python3.9/site-packages/numpy/core/_multiarray_umath.cpython-39-darwin.so
  Reason: tried: '/Users/user/miniforge3/envs/pth11env/lib/libcblas.3.dylib' (no such file), '/Users/user/miniforge3/envs/pth11env/lib/libcblas.3.dylib' (no such file), '/Users/user/miniforge3/envs/pth11env/lib/python3.9/site-packages/numpy/core/../../../../libcblas.3.dylib' (no such file), '/Users/user/miniforge3/envs/pth11env/lib/libcblas.3.dylib' (no such file), '/Users/user/miniforge3/envs/pth11env/lib/libcblas.3.dylib' (no such file), '/Users/user/miniforge3/envs/pth11env/lib/python3.9/site-packages/numpy/core/../../../../libcblas.3.dylib' (no such file), '/Users/user/miniforge3/envs/pth11env/lib/libcblas.3.dylib' (no such file), '/Users/user/miniforge3/envs/pth11env/bin/../lib/libcblas.3.dylib' (no such file), '/Users/user/miniforge3/envs/pth11env/lib/libcblas.3.dylib' (no such file), '/Users/user/miniforge3/envs/pth11env/bin/../lib/libcblas.3.dylib' (no such file), '/usr/local/lib/libcblas.3.dylib' (no such file), '/usr/lib/libcblas.3.dylib' (no such file)
	}

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原因分析：

这里提示
Reason: tried: ‘/Users/user/miniforge3/envs/pth11env/lib/libcblas.3.dylib’ (no such file), ‘/Users/user/miniforge3/envs/pth11env/lib/libcblas.3.dylib’ (no such file)…
可能是缺少文件

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解决方案：

在网上查了一下说numpy依赖openblas，默认没有安装。手动安装openblas不完全，需要手动配置链接库软链。

conda install openblas//使用该命令安装openblas

conda list | grep blas//检查安装结果

到/Users/user/miniforge3/envs/pth11env/lib/路径下检查该文件

使用cat命令打开提示没有该文件
cat: libcblas.3.dylib: No such file or directory
但使用ls -al 可以看到该文件被软连接到libopenblas_vortexp-r0.3.18.dylib
于是排查libopenblas_vortexp-r0.3.18.dylib发现依旧提示不存在，于是建立软连接

ln -s libopenblas.dylib libopenblas_vortexp-r0.3.18.dylib

再次cat libcblas.3.dylib确认正常

在python中import torch正常。

参考：https://www.cnblogs.com/suanec/p/16014323.html