步骤如下：
确认已安装python3，打开终端，输入python3，看是否能进入交互界面。exit()可退出python3交互界面打开sublime text3Sublime -> Tools -> Build system ->New Build System 在出现的文件中填下以下内容 { “cmd”: [“python3”, “-u”, “$file”], “file_regex”: “File "(…?)”, line ([0-9]*)", “selector”: “source.python” } ctrl+s保存在默认要保存的目录（~/Library/ApplicationSupport/Sublime Text 3/Packages/User）,命名为Python3.sublime-build,然后就可以在Tools->Build system中选择python3了。Sublime -> Tools -> Build system ->Python3Sublime -> Tools -> Build即可运行。
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