如何在macos上升级到python 3.6.4？

Question

我正在尝试使用python 3.6.4：

n155-p250:Desktop sahandzarrinkoub$ brew upgrade python3
Updating Homebrew...
==> Auto-updated Homebrew!
Updated 1 tap (homebrew/core).
==> Updated Formulae
bash-preexec        jenkins             presto              ttf2eot
cppcheck            khard               qpdf                txr
docker-gen          lz4                 scummvm             unixodbc
duplicity           mdp                 scummvm-tools       verilator
get-flash-videos    mycli               sslsplit
get_iplayer         ola                 tin
gobuster            ponyc               tokei

Error: python3 3.6.4_2 already installed
n155-p250:Desktop sahandzarrinkoub$ python3
Python 3.6.2 (v3.6.2:5fd33b5926, Jul 16 2017, 20:11:06) 
[GCC 4.2.1 (Apple Inc. build 5666) (dot 3)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> 

尽管我已经安装了它，但我不能通过输入python3来使用它。我该怎么解决这个问题？我希望删除3.6.2，并将python3映射到3.6.4。

Answer 1

由于您的python3没有链接到自制的python3，所以您应该让它强制重新链接python3。

rm /usr/local/bin/python3
brew unlink python3; brew link --overwrite python3

我的机器上的python3链接是：

/usr/local/bin/python3 -> ../Cellar/python3/3.6.4/bin/python3

Answer 2

要更新python，在终端中运行brew update (这将更新Homebrew)，那么brew upgrade python3在最后可以运行brew cleanup python3以删除旧版本