#! /usr/bin/env python
# -*- coding: utf-8 -*-
# Exemple d'utilisation des cases à cocher

import tkinter as tk

def affiche_choix():
    print(zip(elements, [etats[i].get() for i in range(len(elements))]))
    print(elements, [etats[i].get() for i in range(len(elements))])

root = tk.Tk()
lab = tk.Label(root, text="Cochez les éléments présents", bg="red", fg="dark blue")
lab.grid(row = 0)

elements = ['C','H','O','N','P','S',u'éléments métalliques',u'halogénures',u'autres']
etats = []
nelem = len(elements)

for i in range(nelem):
    etat = tk.IntVar()
    caco = tk.Checkbutton(root, text=elements[i], variable=etat,width = 20,padx=50,anchor = tk.W)
    caco.grid(row = i+1)
    etats.append(etat)

button = tk.Button(root, text='Affichez !', width=25, command=affiche_choix)
button.grid(row = nelem+1)

tk.mainloop()