{
 "cells": [
  {
   "cell_type": "markdown",
   "metadata": {
    "nbsphinx": "hidden"
   },
   "source": [
    "[prev: Gérer les exceptions](exceptions.ipynb) | [home](../index.ipynb) | [next: Fonctions d'ordre supérieur](higher-order-function.ipynb)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# Listes en intension"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "Où comment faire des boucles sans en faire (et sans `map` et `filter`)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 1,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "[0, 4, 16, 36, 64]"
      ]
     },
     "execution_count": 1,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "# list comprehension\n",
    "\n",
    "iterable = range(10)\n",
    "\n",
    "[i ** 2 for i in iterable if (i % 2 == 0)]"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "{'toto': 0, 'tata': 1, 'titi': 2}"
      ]
     },
     "execution_count": 2,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "# dict comprehension\n",
    "\n",
    "iterable = ['toto', 'tata', 'titi']\n",
    "\n",
    "{nom: num for (num, nom) in enumerate(iterable)}"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 3,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "<generator object <genexpr> at 0x00000239D2686180>\n"
     ]
    },
    {
     "data": {
      "text/plain": [
       "'bonjour tout le monde'"
      ]
     },
     "execution_count": 3,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "# generator comprehension\n",
    "\n",
    "iterable = ['bonjour', None, None, 'tout', None, 'le', None, None, None, 'monde']\n",
    "\n",
    "generator = (mot for mot in iterable if mot is not None)\n",
    "\n",
    "print(generator)\n",
    "' '.join(generator)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## Exercices"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "- [Filtrage de liste](../exercises/exercises.ipynb#Exercice-8-:-filtrage-de-liste)"
   ]
  }
 ],
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