# -*- coding: utf-8 -*-
def tri_bulle(liste):
    done = False
    while not done:
        done = True
        for i in range(len(liste) - 1):
            if liste[i] > liste[i + 1]:
                done = False
                liste[i], liste[i + 1] = \
                    liste[i + 1], liste[i]
    return liste

print tri_bulle([1, 3, 2, 5, 4, -2])