安装依赖报错！

[RiverChu0]

Describe the bug A clear and concise description of what the bug is.

Collecting meinheld<2.0.0,>=1.0.0
  Downloading http://pypi.doubanio.com/packages/a6/41/f11e4dbfe35f251b1fe10cee5b186a4ac29de3e03fede010db40313d829e/meinheld-1.0.2.tar.gz (83 kB)
     ---------------------------------------- 83.1/83.1 kB ? eta 0:00:00
  Preparing metadata (setup.py) ... error
  error: subprocess-exited-with-error

  × python setup.py egg_info did not run successfully.
  │ exit code: 1
  ╰─> [2 lines of output]
      Are you really running a posix compliant OS ?
      Be posix compliant is mandatory
      [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.

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Expected behavior A clear and concise description of what you expected to happen.

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Environments (please complete the following information):

• OS: [e.g. macOS 10.15.2] windows10
• Python [e.g. Python 3.6] 3.9
• Browser [e.g. Chrome 67 ]

Additional context Add any other context about the problem here.

[zenglaoren]

我也遇到这种情况了，咋解决呀

[Junlens]

tornado meinheld These two modules do not need to be installed and can be deleted or skipped directly