无法为使用 PEP 517 的 cryptography 构建 wheels，因此无法直接安装。

Question

C:\Program Files (x86)\Microsoft Visual Studio\2019\BuildTools\VC\Tools\MSVC\14.24.28314\bin\HostX86\x64\cl.exe /c /nologo /Ox /W3 /GL /DNDEBUG /MD "-IE:\Python Project\PropertyTax\venv\i
nclude" -IC:\Users\pc1\AppData\Local\Programs\Python\Python38\include -IC:\Users\pc1\AppData\Local\Programs\Python\Python38\include "-IC:\Program Files (x86)\Microsoft Visual Studio\2019\Bu
ildTools\VC\Tools\MSVC\14.24.28314\include" "-IC:\Program Files (x86)\Windows Kits\NETFXSDK\4.8\include\um" "-IC:\Program Files (x86)\Windows Kits\10\include\10.0.18362.0\ucrt" "-IC:\Progra
m Files (x86)\Windows Kits\10\include\10.0.18362.0\shared" "-IC:\Program Files (x86)\Windows Kits\10\include\10.0.18362.0\um" "-IC:\Program Files (x86)\Windows Kits\10\include\10.0.18362.0\
winrt" "-IC:\Program Files (x86)\Windows Kits\10\include\10.0.18362.0\cppwinrt" /Tcbuild\temp.win-amd64-3.8\Release\_openssl.c /Fobuild\temp.win-amd64-3.8\Release\build\temp.win-amd64-3.8\R
elease\_openssl.obj
  _openssl.c
  build\temp.win-amd64-3.8\Release\_openssl.c(498): fatal error C1083: Cannot open include file: 'openssl/opensslv.h': No such file or directory
  error: command 'C:\\Program Files (x86)\\Microsoft Visual Studio\\2019\\BuildTools\\VC\\Tools\\MSVC\\14.24.28314\\bin\\HostX86\\x64\\cl.exe' failed with exit status 2

  ----------------------------------------

  Failed building wheel for cryptography
  Running setup.py clean for cryptography`enter code here`
Failed to build cryptography
Could not build wheels for cryptography which use PEP 517 and cannot be installed directly

- Niranjan

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你找到解决方案了吗？ - neilharia7

Answer 1

尝试

python3 -m pip install --upgrade --no-use-pep517 cryptography

这对我在Ubuntu 18.04上的armhf架构上解决了问题：

其他建议使用以下命令将pip、setuptools和wheel升级到最新版本：

python3 -m pip install --upgrade pip setuptools wheel

在我的情况下没有帮助，也许在你的情况下有用

- FoxRomeo

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错误：禁用 PEP 517 处理无效：项目在 pyproject.toml 中指定了构建后端为 setuptools.build_meta。 - Ezequiel Adrian