Python 3.x 我的Macbook上有两个python版本，需要帮助解决这个问题吗
我最近买了macbook，我对这个操作系统的一切都是新手。遵循一些教程来设置机器的编程和开发。这样，我通过自制安装了python（3.9），后来在brew和terminal中检查路径时，都指向python 2.7.16，然后我意识到Mac OS已经有了自己的2.7.16安装。现在，我正在网上浏览多个建议，如何克服这个问题，并将单个版本作为默认版本。我发现以下命令将brew版本（3.9.15）与系统版本（2.7.16）链接起来。抄袭另一篇文章 以下是让我困惑的原因以及我是如何解决的Python 3.x 我的Macbook上有两个python版本，需要帮助解决这个问题吗,python-3.x,macos,python-2.7,homebrew,Python 3.x,Macos,Python 2.7,Homebrew,我最近买了macbook，我对这个操作系统的一切都是新手。遵循一些教程来设置机器的编程和开发。这样，我通过自制安装了python（3.9），后来在brew和terminal中检查路径时，都指向python 2.7.16，然后我意识到Mac OS已经有了自己的2.7.16安装。现在，我正在网上浏览多个建议，如何克服这个问题，并将单个版本作为默认版本。我发现以下命令将brew版本（3.9.15）与系统版本（2.7.16）链接起来。抄袭另一篇文章 以下是让我困惑的原因以及我是如何解决的 $ which
$ which python
/usr/bin/python
$ which python3
/usr/local/bin/python3
$ ls /usr/local/bin/python
ls: /usr/local/bin/python: No such file or directory
So notice I didn't have a HomeBrew installation of python2.7, but did have the python3 installation. The version under /usr/bin/python is using the system default. You can tell based on the module search path:
$ /usr/bin/python
Python 2.7.10 (default, Feb 7 2017, 00:08:15)
[GCC 4.2.1 Compatible Apple LLVM 8.0.0 (clang-800.0.34)] on darwin
`enter code here`Type "help", "copyright", "credits" or "license" for
more information.
>>> import sys
>>> sys.path
['', '/Library/Python/2.7/...
Notice the '/Library/Python'... that's Mac OS's version of python. But I want to stay strictly on a user installed version (i.e. HomeBrew).
So here's what I did to fix this:
$ brew install python
...
Warning: python 2.7.13 is already installed, it's just not linked.
You can use `brew link python` to link this version.
$ brew link --overwrite python
$ which python
/usr/local/bin/python
$ python
Python 2.7.10 (default, Feb 7 2017, 00:08:15)
[GCC 4.2.1 Compatible Apple LLVM 8.0.0 (clang-800.0.34)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import sys
>>> sys.path
['', '/usr/local/Cellar/python/2.7.13...
Its no longer /Library/.. but /usr/local.
alias py3=python3py3python3