Sublime text 3 and Python 3 build on MacOS

By default, Sublime text uses python command to build a python code and MacOS ships with python 2.7. If you want to use python 3 with sublime text build, first install desired Python 3 package.

To build Python 3 on Sublime text go to Tools-> Build System -> New Build System

Paste the following command:

{
    "shell_cmd": "/usr/bin/env python3 ${file}",
    "selector": "source.python",
    "file_regex": "^(...*?):([0-9]*):?([0-9]*)",
    "working_dir": "${file_path}"
}

then save as Python3.sublime-build into /Users//Library/Application Support/Sublime Text 3/Packages/User

then open a new file and add the following lines to test python version.

import sys
print (sys.version)

Choose Python 3 build and Ctrl+B

You should see in the bottom of the Sublime text

3.6.3 (v3.6.3:2c5fed86e0, Oct  3 2017, 00:32:08) 
[GCC 4.2.1 (Apple Inc. build 5666) (dot 3)]
[Finished in 0.4s]