Most Unix/Linux systems come with python pre-installed:
$ python -V
| import javafx.animation.FadeTransition; | |
| import javafx.application.Application; | |
| import javafx.beans.property.ReadOnlyObjectProperty; | |
| import javafx.collections.*; | |
| import javafx.concurrent.*; | |
| import javafx.geometry.*; | |
| import javafx.scene.Scene; | |
| import javafx.scene.control.*; | |
| import javafx.scene.effect.DropShadow; | |
| import javafx.scene.image.*; | 
| from Tkinter import * | |
| # First create application class | |
| class Application(Frame): | |
| def __init__(self, master=None): | |
| Frame.__init__(self, master) | 
| public class RealPathUtil { | |
| public static String getRealPath(Context context, Uri fileUri) { | |
| String realPath; | |
| // SDK < API11 | |
| if (Build.VERSION.SDK_INT < 11) { | |
| realPath = RealPathUtil.getRealPathFromURI_BelowAPI11(context, fileUri); | |
| } | |
| // SDK >= 11 && SDK < 19 | |
| else if (Build.VERSION.SDK_INT < 19) { | 
I have summarized and compiled a list of React.JS best practices from various sources across the internet.
| package com.example.pathutils | |
| import android.content.ContentUris; | |
| import android.content.Context; | |
| import android.database.Cursor; | |
| import android.net.Uri; | |
| import android.os.Build; | |
| import android.os.Environment; | |
| import android.provider.DocumentsContract; | |
| import android.provider.MediaStore; |