Mac 下 安装Python3

因为Mac系统自带Python2.7 所以我们开发要重新装Python3

直接运行下面就好

luohaotiandeMacBook-Pro:~ luohaotian$ which python
/usr/bin/python
luohaotiandeMacBook-Pro:~ luohaotian$ cd /usr/local/bin/
luohaotiandeMacBook-Pro:bin luohaotian$ ls
brew        lz4     perlthanks  ptardiff    svnrdump
cnpm        lz4c        piconv      ptargrep    svnserve
corelist    lz4cat      pl2pm       shasum      svnsync
cpan        node        pod2html    splain      svnversion
enc2xs      npm     pod2man     svn     unlz4
encguess    npx     pod2text    svnadmin    vue
h2ph        perl        pod2usage   svnbench    vue-init
h2xs        perl5.30.0  podchecker  svndumpfilter   vue-list
instmodsh   perlbug     podselect   svnfsfs     webpack
json_pp     perldoc     prove       svnlook     xsubpp
libnetcfg   perlivp     ptar        svnmucc     zipdetails
luohaotiandeMacBook-Pro:bin luohaotian$ python -V
Python 2.7.10
luohaotiandeMacBook-Pro:bin luohaotian$ brew search python3
==> Formulae
boost-python3              python3                    python@3
luohaotiandeMacBook-Pro:bin luohaotian$ brew install python3
Updating Homebrew...
==> Auto-updated Homebrew!
Updated 1 tap (homebrew/core).
==> Updated Formulae
jdupes                                   mk-configure

==> Installing dependencies for python: gdbm and xz
==> Installing python dependency: gdbm
==> Downloading https://homebrew.bintray.com/bottles/gdbm-1.18.1.mojave.bottle.1
######################################################################## 100.0%
==> Pouring gdbm-1.18.1.mojave.bottle.1.tar.gz
?  /usr/local/Cellar/gdbm/1.18.1: 20 files, 586.8KB
==> Installing python dependency: xz
==> Downloading https://homebrew.bintray.com/bottles/xz-5.2.4.mojave.bottle.tar.
==> Downloading from https://akamai.bintray.com/01/010667293df282c8bceede3bcd369
######################################################################## 100.0%
==> Pouring xz-5.2.4.mojave.bottle.tar.gz
?  /usr/local/Cellar/xz/5.2.4: 92 files, 1MB
==> Installing python
==> Downloading https://homebrew.bintray.com/bottles/python-3.7.3.mojave.bottle.
==> Downloading from https://akamai.bintray.com/25/25e0099852136c4ef1efd221247d0
######################################################################## 100.0%
==> Pouring python-3.7.3.mojave.bottle.tar.gz
==> /usr/local/Cellar/python/3.7.3/bin/python3 -s setup.py --no-user-cfg install
==> /usr/local/Cellar/python/3.7.3/bin/python3 -s setup.py --no-user-cfg install
==> /usr/local/Cellar/python/3.7.3/bin/python3 -s setup.py --no-user-cfg install
==> Caveats
Python has been installed as
  /usr/local/bin/python3

Unversioned symlinks `python`, `python-config`, `pip` etc. pointing to
`python3`, `python3-config`, `pip3` etc., respectively, have been installed into
  /usr/local/opt/python/libexec/bin

If you need Homebrew's Python 2.7 run
  brew install python@2

You can install Python packages with
  pip3 install <package>
They will install into the site-package directory
  /usr/local/lib/python3.7/site-packages

See: https://docs.brew.sh/Homebrew-and-Python
==> Summary
?  /usr/local/Cellar/python/3.7.3: 3,863 files, 59.8MB
==> Caveats
==> python
Python has been installed as
  /usr/local/bin/python3

Unversioned symlinks `python`, `python-config`, `pip` etc. pointing to
`python3`, `python3-config`, `pip3` etc., respectively, have been installed into
  /usr/local/opt/python/libexec/bin

If you need Homebrew's Python 2.7 run
  brew install python@2

You can install Python packages with
  pip3 install <package>
They will install into the site-package directory
  /usr/local/lib/python3.7/site-packages

See: https://docs.brew.sh/Homebrew-and-Python
luohaotiandeMacBook-Pro:bin luohaotian$ brew info python3
python: stable 3.7.3 (bottled), HEAD
Interpreted, interactive, object-oriented programming language
https://www.python.org/
/usr/local/Cellar/python/3.7.3 (3,863 files, 59.8MB) *
  Poured from bottle on 2019-06-04 at 18:24:52
From: https://github.com/Homebrew/homebrew-core/blob/master/Formula/python.rb
==> Dependencies
Build: pkg-config ✘
Required: gdbm ✔, openssl ✔, readline ✔, sqlite ✔, xz ✔
==> Options
--HEAD
    Install HEAD version
==> Caveats
Python has been installed as
  /usr/local/bin/python3

Unversioned symlinks `python`, `python-config`, `pip` etc. pointing to
`python3`, `python3-config`, `pip3` etc., respectively, have been installed into
  /usr/local/opt/python/libexec/bin

If you need Homebrew's Python 2.7 run
  brew install python@2

You can install Python packages with
  pip3 install <package>
They will install into the site-package directory
  /usr/local/lib/python3.7/site-packages

See: https://docs.brew.sh/Homebrew-and-Python
==> Analytics
install: 378,873 (30 days), 1,357,511 (90 days), 4,253,975 (365 days)
install_on_request: 181,954 (30 days), 660,530 (90 days), 2,431,795 (365 days)
build_error: 0 (30 days)
luohaotiandeMacBook-Pro:bin luohaotian$ 

转载于:https://www.cnblogs.com/adrien/p/10975362.html