python 3.9安装mxnet

这一天都在安装mxnet…
尝试了网上许多方法都无法安装，因为我的python是3.9的，网上大部分教程都是3.8及以下的，阿里云资源上也没有mxnet3.9的win版本，试了很多很多方法都无法安装，一直报错

 note: This error originates from a subprocess, and is likely not a problem with pip.
  Rolling back uninstall of numpy
  Moving to d:\anaconda\lib\site-packages\numpy-1.21.5.dist-info\
   from D:\anaconda\Lib\site-packages\~umpy-1.21.5.dist-info
  Moving to d:\anaconda\lib\site-packages\numpy\
   from D:\anaconda\Lib\site-packages\~umpy
  Moving to d:\anaconda\scripts\f2py.exe
   from C:\Users\Wuruiqian\AppData\Local\Temp\pip-uninstall-_ns9djsa\f2py.exe
error: legacy-install-failure

× Encountered error while trying to install package.
╰─> numpy

note: This is an issue with the package mentioned above, not pip.
hint: See above for output from the failure.

上面提示不是pip问题，是package包的问题，如果pip版本太低的话也会报错，需要升级pip

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解决方法：

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1.自己在anaconda建一个环境并取一个名字，比如我取的名字是mxnet

conda creat -n mxnet python=3.9

2.激活环境

activate mxnet

3.此时在anaconda/envs文件夹下会有一个mxnet文件夹
下载完mxnet-1.9.0+mkl-cp39-cp39-win_amd64.whl后将其复制到anaconda/envs/mxnet/scripts文件夹下面

4在anaconda内将位置定位到scripts文件夹下面

5.安装mxnet

pip install mxnet-1.9.0+mkl-cp39-cp39-win_amd64.whl

6.查看是否安装成功

conda list

成功！

如有想要mxnet-1.9.0+mkl-cp39-cp39-win_amd64.whl的后台可私信我哦