如何解决legacy-install-failure错误？

Question

 building 'matplotlib.ft2font' extension\n      \nerror: Microsoft Visual C++ 14.0 or greater is required. Get it with "Microsoft C++ Build Tools": <https://visualstudio.microsoft.com/visual-cpp-build-tools/>\n      [end of output]\n\n  note: This error originates from a subprocess, and is likely not a problem with pip.\nerror: legacy-install-failure\n\n\xc3\x97 Encountered error while trying to install package.\n\xe2\x95\xb0\xe2\x94\x80> matplotlib\n\nnote: This is an issue with the package mentioned above, not pip.\nhint: See above for output from the failure\n

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Answer 1

您需要下载Microsoft C++ Build Tools 并将其安装在系统中，然后选择Workloads并选中Desktopdevelopment using C++选项。完成后，您可以再次运行安装命令。

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或者

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您还可以选择从\n Python 扩展包的非官方 Windows 二进制文件下载此 Python 库

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1. 下载名为pip install matplotlib\xe2\x80\x913.5.1\xe2\x80\x91cp38\xe2\x80\x91cp38\xe2\x80\x91win_amd64.whl \n屏幕截图
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2. 下载文件后，在该文件夹中打开 cmd并运行\n命令：
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3. pip install matplotlib\xe2\x80\x913.5.1\xe2\x80\x91cp38\xe2\x80\x91cp38\xe2\x80\x91win_amd64.whl
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类似的答案

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Answer 2

在此输入图像描述

您需要下载 Microsoft C++ Build Tools 并将其安装在系统中，然后选择 Workloads 并选中 Desktopdevelopment using C++ 选项。

pip install -r 要求.txt