1、pip install mxnet，失败，提示：
No module named 'numpy.distutils._msvccompiler' in numpy.distutils; trying from distutils
error: Microsoft Visual C++ 14.0 or greater is required. Get it with "Microsoft C++ Build Tools": https://visualstudio.microsoft.com/visual-cpp-build-tools/
[end of output]
note: This error originates from a subprocess, and is likely not a problem with pip.
WARNING: No metadata found in d:\program files (x86)\python3.9.4\lib\site-packages
Rolling back uninstall of numpy
Moving to d:\program files (x86)\python3.9.4\lib\site-packages\numpy-1.22.3.dist-info\
from D:\Program Files (x86)\python3.9.4\Lib\site-packages\~umpy-1.22.3.dist-info
Moving to d:\program files (x86)\python3.9.4\lib\site-packages\numpy\
from D:\Program Files (x86)\python3.9.4\Lib\site-packages\~-mpy
Moving to d:\program files (x86)\python3.9.4\scripts\f2py.exe
from C:\Users\lilin\AppData\Local\Temp\pip-uninstall-a6sj89ba\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.
WARNING: Ignoring invalid distribution -ip (d:\program files (x86)\python3.9.4\lib\site-packages)
WARNING: Ignoring invalid distribution -ip (d:\program files (x86)\python3.9.4\lib\site-packages)
WARNING: Ignoring invalid distribution -ip (d:\program files (x86)\python3.9.4\lib\site-packages)
2、尝试
（1）pip uninstall numpy,失败
（2）解决常见pip install错误方法；
在mxnet文件本地路径下输入cmd,输入”pip install
F:\Download>pip install mxnet-1.9.0+mkl-cp39-cp39-win_amd64.whl
文件下载链接：手动搜索mxnet
https://www.lfd.uci.edu/~gohlke/pythonlibs/#basemap
遇到同类问题：
1、python – Gettingerror: legacy-install-failure, while installing basemap – Stack Overflow
2、python – How to resolve the error of legacy-install-failure? – Stack Overflow
其他链接：
附录:
1、
ModuleNotFoundError: No module named 'pip'
解决办法
python -m ensurepip
python -m pip install --upgrade pip
3、https://github.com/apache/incubator-mxnet/releases
4、下载链接
https://www.lfd.uci.edu/~gohlke/pythonlibs/#numpy
5、CUDA Toolkit 11.7 Downloads | NVIDIA Developer
6、mxnet对应cuda版本下载：Profile of mxnet · PyPI
7、Latest supported Visual C++ Redistributable downloads | Microsoft Docs
8、ensurepip — Bootstrapping the pip installer — Python 3.10.4 documentation
9、Amazon SageMaker Studio Lab – Amazon SageMaker
10、Troubleshooting ImportError — NumPy v1.23.dev0 Manual
11、From torch._C import * : No Torch._C! – #3 by skaminsky – PyTorch Forums
Original: https://blog.csdn.net/u011367131/article/details/124772321
Author: lleen-Lee
Title: from mxnet import np，报错提示error: legacy-install-failure× Encountered error while trying to install
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