无法“酿造安装后 python3”

Question

当我跑的时候brew postinstall python3，失败了。

错误代码：

$ brew postinstall python@3.9 --debug
/usr/local/Homebrew/Library/Homebrew/brew.rb (Formulary::FormulaLoader): loading /usr/local/Homebrew/Library/Taps/homebrew/homebrew-core/Formula/python@3.9.rb
==> Postinstalling python@3.9
==> /usr/local/Cellar/python@3.9/3.9.1_8/bin/python3 -m ensurepip
Last 15 lines from /Users/wangdi/Library/Logs/Homebrew/python@3.9/post_install.01.python3:
2021-02-09 21:23:55 +0800

/usr/local/Cellar/python@3.9/3.9.1_8/bin/python3
-m
ensurepip

Warning: The post-install step did not complete successfully
You can try again using:
  brew postinstall python@3.9
==> An exception occurred within a child process:
  BuildError: Failed executing: /usr/local/Cellar/python@3.9/3.9.1_8/bin/python3 -m ensurepip

/usr/local/Homebrew/Library/Homebrew/formula.rb:2108:in `block in system'
/usr/local/Homebrew/Library/Homebrew/formula.rb:2044:in `open'
/usr/local/Homebrew/Library/Homebrew/formula.rb:2044:in `system'
/usr/local/Homebrew/Library/Taps/homebrew/homebrew-core/Formula/python@3.9.rb:272:in `post_install'
/usr/local/Homebrew/Library/Homebrew/formula.rb:1058:in `block (2 levels) in run_post_install'
/usr/local/Homebrew/Library/Homebrew/formula.rb:900:in `with_logging'
/usr/local/Homebrew/Library/Homebrew/formula.rb:1057:in `block in run_post_install'
/usr/local/Homebrew/Library/Homebrew/utils.rb:532:in `with_env'
/usr/local/Homebrew/Library/Homebrew/formula.rb:1046:in `run_post_install'
/usr/local/Homebrew/Library/Homebrew/postinstall.rb:22:in `<main>'

说运行失败/usr/local/Cellar/python@3.9/3.9.1_8/bin/python3 -m ensurepip 。我列出了目录，但没有/usr/local/Cellar/python@3.9/3.9.1_8/bin

$ ls /usr/local/Cellar/python@3.9/3.9.1_8 
Frameworks

brew doctor结果：

$ brew doctor              
Please note that these warnings are just used to help the Homebrew maintainers
with debugging if you file an issue. If everything you use Homebrew for is
working fine: please don't worry or file an issue; just ignore this. Thanks!

Warning: Putting non-prefixed coreutils in your path can cause GMP builds to fail.

Warning: Putting non-prefixed findutils in your path can cause python builds to fail.