Install Python, VSCode by googling.
And open VSCode and make folder and open folder.
You have to setting in View - Command palette and searching 'Select Interpreter' - click version of Python3.
Then you can see the version at left-down. 
Now you can write Python code!
And You have to set the task to useful action in view - palette - Configure task - Others.
You can see the file of JSON. then change the code like this(look down side).
{
// See https://go.microsoft.com/fwlink/?LinkId=733558
// for the documentation about the tasks.json format
"version": "2.0.0",
"tasks": [
{
"label": "Project Label",
"type": "shell",
"command": "python",
"args": [
"${file}"
],
"presentation": {
"reveal": "always",
"panel": "new"
},
"options": {
"env": {
"PYTHONIOENCODING": "UTF-8"
}
},
"group": {
"kind": "build",
"isDefault": true
}
}
]
}
NOW, you can play your code by <cmd+shift+B>. It so easy!