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最近安装python库的时候各种报错，

pip3  install python-multipart -i http://mirrors.aliyun.com/pypi/simple/ --trusted-host mirrors.aliyun.com

具体如下：

Collecting python-multipart==0.0.5
  Downloading http://mirrors.aliyun.com/pypi/packages/46/40/a933ac570bf7aad12a298fc53458115cc74053474a72fbb8201d7dc06d3d/python-multipart-0.0.5.tar.gz (32 kB)
  Preparing metadata (setup.py) ... error
  error: subprocess-exited-with-error

  × python setup.py egg_info did not run successfully.
  │ exit code: 1
  ╰─> [1 lines of output]
      ERROR: Can not execute `setup.py` since setuptools is not available in the build environment.
      [end of output]

  note: This error originates from a subprocess, and is likely not a problem with pip.
error: metadata-generation-failed

× Encountered error while generating package metadata.
╰─> See above for output.

note: This is an issue with the package mentioned above, not pip.
hint: See above for details.

最终发现解决方案是需要更新另一个库，这里记录一下，解决如下：

pip3 install --upgrade setuptools -i http://mirrors.aliyun.com/pypi/simple/ --trusted-host mirrors.aliyun.com

更新一下setuptools就好了。