Brew-重新安装python @ 2

Question

我在brews which have explained here (unresolved)上遇到openssl和python @ 2的问题。已记录的重新安装Python和openssl的解决方法不起作用，因此我决定卸载并重新安装Python。

问题是，当您尝试通过brew安装Python 2时，收到此消息：

brew install python@2
Error: No available formula with the name "python@2"
==> Searching for a previously deleted formula (in the last month)...
Warning: homebrew/core is shallow clone. To get complete history run:
  git -C "$(brew --repo homebrew/core)" fetch --unshallow

python@2 was deleted from homebrew/core in commit 028f11f9e:
  python@2: delete (https://github.com/Homebrew/homebrew-core/issues/49796)
  EOL 1 January 2020.
  We gave it 1 month more to live so that people had time to migrate.
  All in all, developers had 11 years to do their migration.
  You can use the `brew extract` command and maintain python@2 in your own
  tap if necessary:
  https://docs.brew.sh/How-to-Create-and-Maintain-a-Tap

To show the formula before removal run:
  git -C "$(brew --repo homebrew/core)" show 028f11f9e^:Formula/[email protected]

If you still use this formula consider creating your own tap:
  https://docs.brew.sh/How-to-Create-and-Maintain-a-Tap

[不幸的是，我仍然有许多酿造公式，取决于Brew的python @ 2。这些包括awscli，letsencrypt，pr sshuttle例如

aws
zsh: /usr/local/bin/aws: bad interpreter: /usr/local/opt/python@2/bin/python2.7: no such file or directory

我不知道他们如何使用此brew extract命令来重新安装Python @ 2。它需要一个公式和一个水龙头。我想公式是python@2。我不确定水龙头将是什么。

另外重新安装诸如aws或letsencrypt的水龙头也不能很好地工作。

[重新安装awscli（brew reinstall awscli）后，运行aws命令仍然会出错。

aws
/usr/local/Cellar/awscli/2.0.0/libexec/lib/python3.8/site-packages/jmespath/visitor.py:32: SyntaxWarning: "is" with a literal. Did you mean "=="?
  if x is 0 or x is 1:
/usr/local/Cellar/awscli/2.0.0/libexec/lib/python3.8/site-packages/jmespath/visitor.py:32: SyntaxWarning: "is" with a literal. Did you mean "=="?
  if x is 0 or x is 1:
/usr/local/Cellar/awscli/2.0.0/libexec/lib/python3.8/site-packages/jmespath/visitor.py:34: SyntaxWarning: "is" with a literal. Did you mean "=="?
  elif y is 0 or y is 1:
/usr/local/Cellar/awscli/2.0.0/libexec/lib/python3.8/site-packages/jmespath/visitor.py:34: SyntaxWarning: "is" with a literal. Did you mean "=="?
  elif y is 0 or y is 1:
/usr/local/Cellar/awscli/2.0.0/libexec/lib/python3.8/site-packages/jmespath/visitor.py:260: SyntaxWarning: "is" with a literal. Did you mean "=="?
  if original_result is 0:
usage: aws [options] <command> <subcommand> [<subcommand> ...] [parameters]
To see help text, you can run:

  aws help
  aws <command> help
  aws <command> <subcommand> help
aws: error: the following arguments are required: command

Answer 1

看来，自制软件的工作人员确实使得尽可能地在macOS上使用Python 2.7变得更加困难。

1. 链接的brew extract链接确实没有帮助，您需要在此处查找有关如何从提取的资源中进行自己点击的答案。
2. 链接的提交：028f11f9e是错误的，因为它包含已删除的文件。
3. brew extract命令doesn't even work correctly，因为软件包名称中的@。

尽管该解决方案非常简单，您只需要从最新的已知提交进行安装：

brew install https://raw.githubusercontent.com/Homebrew/homebrew-core/86a44a0a552c673a05f11018459c9f5faae3becc/Formula/[email protected]

[关于这是“不稳定”的警告，我不理解，因为在Git历史记录中的提交是尽可能稳定的。