// Detects commands executed and prints them.
    function OnGUI() {
        var e : Event = Event.current;
        if(e.commandName != "") {
            Debug.Log("Command recognized: " + e.commandName);    
        }    
    }

using UnityEngine;
using System.Collections;

public class example : MonoBehaviour {
    void OnGUI() {
        Event e = Event.current;
        if (e.commandName != "")
            Debug.Log("Command recognized: " + e.commandName);
        
    }
}

import UnityEngine
import System.Collections

class example(MonoBehaviour):

    def OnGUI():
        e as Event = Event.current
        if e.commandName != '':
            Debug.Log(('Command recognized: ' + e.commandName))