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我正在尝试安装 Twint，每次尝试安装软件包时，我都会收到涉及pycares. 我试过pycares自己安装，我得到了同样的错误。我没有Ares安装或c_ares安装。我也没有homebrew安装。

我可以毫无问题地安装其他软件包。我也试过手动安装pycares，还是不行。

  ERROR: Command errored out with exit status 1:
   command: 'c:\users\conno\appdata\local\programs\python\python39\python.exe' -u -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'C:\\Users\\conno\\AppData\\Local\\Temp\\pip-install-6ytwlxor\\pycares_2a6644854aad49279cec4174797f3f73\\setup.py'"'"'; __file__='"'"'C:\\Users\\conno\\AppData\\Local\\Temp\\pip-install-6ytwlxor\\pycares_2a6644854aad49279cec4174797f3f73\\setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' bdist_wheel -d 'C:\Users\conno\AppData\Local\Temp\pip-wheel-x54knmfy'
       cwd: C:\Users\conno\AppData\Local\Temp\pip-install-6ytwlxor\pycares_2a6644854aad49279cec4174797f3f73\
  Complete output (26 lines):
  running bdist_wheel
  running build
  running build_py
  creating build
  creating build\lib.win-amd64-3.9
  creating build\lib.win-amd64-3.9\pycares
  copying src\pycares\errno.py -> build\lib.win-amd64-3.9\pycares
  copying src\pycares\utils.py -> build\lib.win-amd64-3.9\pycares
  copying src\pycares\_version.py -> build\lib.win-amd64-3.9\pycares
  copying src\pycares\__init__.py -> build\lib.win-amd64-3.9\pycares
  copying src\pycares\__main__.py -> build\lib.win-amd64-3.9\pycares
  running build_ext
  generating cffi module 'build\\temp.win-amd64-3.9\\Release\\_cares.c'
  creating build\temp.win-amd64-3.9
  creating build\temp.win-amd64-3.9\Release
  building '_cares' extension
  creating build\temp.win-amd64-3.9\Release\build
  creating build\temp.win-amd64-3.9\Release\build\temp.win-amd64-3.9
  creating build\temp.win-amd64-3.9\Release\build\temp.win-amd64-3.9\Release
  creating build\temp.win-amd64-3.9\Release\deps
  creating build\temp.win-amd64-3.9\Release\deps\c-ares
  creating build\temp.win-amd64-3.9\Release\deps\c-ares\src
  C:\Program Files (x86)\Microsoft Visual Studio\2019\BuildTools\VC\Tools\MSVC\14.28.29910\bin\HostX86\x64\cl.exe /c /nologo /Ox /W3 /GL /DNDEBUG /MD -DCARES_PULL_WS2TCPIP_H=1 -Ic:\users\conno\appdata\local\programs\python\python39\include -Ic:\users\conno\appdata\local\programs\python\python39\include -Ideps\c-ares\src -IC:\Program Files (x86)\Microsoft Visual Studio\2019\BuildTools\VC\Tools\MSVC\14.28.29910\include /Tcbuild\temp.win-amd64-3.9\Release\_cares.c /Fobuild\temp.win-amd64-3.9\Release\build\temp.win-amd64-3.9\Release\_cares.obj
  _cares.c
  c:\users\conno\appdata\local\programs\python\python39\include\pyconfig.h(59): fatal error C1083: Cannot open include file: 'io.h': No such file or directory
  error: command 'C:\\Program Files (x86)\\Microsoft Visual Studio\\2019\\BuildTools\\VC\\Tools\\MSVC\\14.28.29910\\bin\\HostX86\\x64\\cl.exe' failed with exit code 2
  ----------------------------------------```
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1 回答 1

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如果您查看此页面：https ://pypi.org/project/pycares/3.1.1/#files - 您会看到 Python 3.9 没有轮子。

您可以：

  1. 降级到 3.8
  2. 要求 pycares 的维护者为 3.9 发布轮子
  3. 尝试编译包。

实际错误是C1083: Cannot open include file: 'io.h': No such file or directory哪种表明您没有在尝试安装软件包的 shell 中激活 Visual Studio 开发环境。或者，您没有安装 Windows sdk。查看答案：无法打开包含文件：'io.h'：没有这样的文件或目录

于 2021-03-24T16:28:26.827 回答