{
 "cells": [
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# Tirages au sort dans une liste"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "But : Dans la liste des élèves d'une classe, tirer au sort un élève, 5 élèves..."
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## Récupération de la liste des élèves\n",
    "Le programme ci-dessous permet de de récupérer les prénoms des élèves dans un fichier texte. Pour plus de détails, voir  la rubrique \"Manipulation de fichiers\" dans la page \"Python\"."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 3,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "['Sakina', 'Lilou', 'Corentin', 'Gaia', 'Lisa', 'Gabrielle', 'Imène', 'Nicolas', 'Matéo', 'Naïm', 'Axiane', 'Mazarine', 'Suzanne', 'Youenn', 'Félix', 'Melissa', 'Camille', 'Lisy-Anne', 'Hélène', 'Noa', 'Justine', 'Salim', 'Malo', 'Margot', 'Gwendal', 'Chourouk', 'Samuel', 'Elliot', 'Noé', 'Ambre', 'Antoine', 'Cléome', 'Hugo', 'Alban']\n"
     ]
    }
   ],
   "source": [
    "monFichier = open(\"/media/pv/1B71-6E9B/lycee/20182019/1S/liste1s1.txt\", \"r\")\n",
    "\n",
    "liste1s1 = []\n",
    "for ligne in monFichier:\n",
    "    prenom= ligne.replace('\\n','')\n",
    "    liste1s1 = liste1s1 + [prenom]\n",
    "\n",
    "monFichier.close()\n",
    "print(liste1s1)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## Tirage au sort d'un élève"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 6,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Elliot\n"
     ]
    }
   ],
   "source": [
    "from random import randint\n",
    "\n",
    "i = randint(0,len(liste1s1)-1)\n",
    "eleveChoisi = liste1s1[i]\n",
    "print(eleveChoisi)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## Tirage au sort de 5 élèves"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 7,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "['Camille', 'Axiane', 'Nicolas', 'Salim', 'Lisa']\n"
     ]
    }
   ],
   "source": [
    "from random import randint\n",
    "\n",
    "elevesChoisis = []\n",
    "n = 0 #nombre d'élèves tirés au sort\n",
    "while n < 5:\n",
    "    i = randint(0,len(liste1s1)-1)\n",
    "    eleve = liste1s1[i]\n",
    "    if eleve not in elevesChoisis:\n",
    "        n = n+1\n",
    "        elevesChoisis = elevesChoisis + [eleve]\n",
    "print(elevesChoisis)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "Remarque : il existe choice dans random, qui fournit aléatoirement un élément d'une liste :"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 8,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "['Corentin', 'Sakina', 'Cléome', 'Camille', 'Matéo']\n"
     ]
    }
   ],
   "source": [
    "from random import choice\n",
    "\n",
    "elevesChoisis = []\n",
    "n = 0 #nombre d'élèves tirés au sort\n",
    "while n < 5:\n",
    "    eleve = choice(liste1s1)\n",
    "    if eleve not in elevesChoisis:\n",
    "        n = n+1\n",
    "        elevesChoisis.append(eleve) #append ajoute eleve à la fin de la liste des élèves choisis\n",
    "print(elevesChoisis)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {
    "collapsed": true
   },
   "source": [
    "## Présentation (plus) spectaculaire (en chantier)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": []
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": []
  }
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