pip install functools 引发错误：错误：无法为 functools 构建轮子，这是安装基于 pyproject.toml 的项目所必需的

Question

functools是Python 3.9自带的库，但在Python 3.7中需要安装。现有代码来自3.7.12。现在它无需 functools 即可运行，但使用 pip 安装时会报告：

Collecting functools
  Using cached functools-0.5.tar.gz (4.9 kB)
  Preparing metadata (setup.py) ... done
Building wheels for collected packages: functools
  Building wheel for functools (setup.py) ... error
  error: subprocess-exited-with-error
  
  × python setup.py bdist_wheel did not run successfully.
  │ exit code: 1
  ╰─> [57 lines of output]
      src/compose.c:96:6: error: no member named 'ob_type' in 'struct compose'
              co->ob_type->tp_free(co);
***********A long list of error descriptions in the middle******************
 12 warnings and 3 errors generated.
      error: command '/usr/bin/gcc' failed with exit code 1
      [end of output]
  
  note: This error originates from a subprocess, and is likely not a problem with pip.
  ERROR: Failed building wheel for functools
  Running setup.py clean for functools
Failed to build functools
ERROR: Could not build wheels for functools, which is required to install pyproject.toml-based projects

我在 Linux 和 MACOS 中都遇到此错误。

有人可以帮我解决这个问题吗？

我在 MacOS 中尝试，然后在 Linux 中尝试，但得到相同的错误。并查遍了整个网络，仍然没有找到线索。感觉环境好像少了点什么。

Answer 1

functools 是 Python 3.7 附带的一个库。但我需要的功能不是。我会关闭这个。