写了很久的Python2，今天被Python3 *等特性吸引了，忍不住想试一下。
在MAC OS X上Python的多版本共存，我们可以使用pyenv来解决，配合virtualenv，可以轻松搭建多个虚拟环境。
但是安装的时候，遇到了两个问题。
pyenv错误提示
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~ pyenv install 3.5-dev Cloning https://hg.python.org/cpython... BUILD FAILED (OS X 10.11.6 using python-build 20150818) |
在官网的issues#429发现，用下面的方式解决。
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~ brew link --force openssl Linking /usr/local/Cellar/openssl/1.0.2d_1... 1548 symlinks created |
然后又遇到了下面的问题：
第二个问题
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~ pyenv install 3.5-dev Cloning https://hg.python.org/cpython... Installing Python-3.5-dev... BUILD FAILED (OS X 10.11.6 using python-build 20150818) Inspect or clean up the working tree at /var/folders/23/4kbs9t712jv1mvmw6cpjwr2m0000gn/T/python-build.20160815000934.22185 Results logged to /var/folders/23/4kbs9t712jv1mvmw6cpjwr2m0000gn/T/python-build.20160815000934.22185.log Last 10 log lines: File "/private/var/folders/23/4kbs9t712jv1mvmw6cpjwr2m0000gn/T/python-build.20160815000934.22185/Python-3.5-dev/Lib/ensurepip/__main__.py", line 4, in <module> ensurepip._main() File "/private/var/folders/23/4kbs9t712jv1mvmw6cpjwr2m0000gn/T/python-build.20160815000934.22185/Python-3.5-dev/Lib/ensurepip/__init__.py", line 209, in _main default_pip=args.default_pip, File "/private/var/folders/23/4kbs9t712jv1mvmw6cpjwr2m0000gn/T/python-build.20160815000934.22185/Python-3.5-dev/Lib/ensurepip/__init__.py", line 116, in bootstrap _run_pip(args + [p[0] for p in _PROJECTS], additional_paths) File "/private/var/folders/23/4kbs9t712jv1mvmw6cpjwr2m0000gn/T/python-build.20160815000934.22185/Python-3.5-dev/Lib/ensurepip/__init__.py", line 40, in _run_pip import pip zipimport.ZipImportError: can't decompress data; zlib not available make: *** [install] Error 1 |
然后又查到了issue#451，应该使用下面的命令来安装。
安装命令
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~ CFLAGS="-I$(brew --prefix openssl)/include -I$(xcrun --show-sdk-path)/usr/include" \ LDFLAGS="-L$(brew --prefix openssl)/lib" \ pyenv install -v 3.5-dev |
然后，就安装成功了。
安装成功
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~ pyenv versions * system (set by /Users/laixintao/.pyenv/version) 3.5-dev |
如果需要使用虚拟环境，可以使用下面的命令安装pyenv-virtualenv插件，然后新建虚拟环境。
pyenv-virtualenv
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~ git clone https://github.com/yyuu/pyenv-virtualenv.git ~/.pyenv/plugins/pyenv-virtualenv Cloning into '/Users/laixintao/.pyenv/plugins/pyenv-virtualenv'... remote: Counting objects: 1849, done. remote: Total 1849 (delta 0), reused 0 (delta 0), pack-reused 1849 Receiving objects: 100% (1849/1849), 527.44 KiB | 699.00 KiB/s, done. Resolving deltas: 100% (1267/1267), done. Checking connectivity... done. ~ echo 'eval "$(pyenv virtualenv-init -)"' >> ~/.bash_profile ~ source ~/.bash_profile ~ pyenv virtualenv 3.5-dev hackerrank Ignoring indexes: https://pypi.python.org/simple Requirement already satisfied (use --upgrade to upgrade): setuptools in /Users/laixintao/.pyenv/versions/3.5-dev/envs/hackerrank/lib/python3.5/site-packages Requirement already satisfied (use --upgrade to upgrade): pip in /Users/laixintao/.pyenv/versions/3.5-dev/envs/hackerrank/lib/python3.5/site-packages |
以这样的方式新建的虚拟环境，位置在~/.pyenv/versions如果使用pycharm的话，可以从这个路径导入。