Premature optimization is the root of all evil.

enfants.ipynb

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    {
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     "text": [
      "10 loops, best of 3: 246 ms per loop\n"
     ]
    }
   ],
   "source": [
    "%%timeit -n10 pass\n",
    "\n",
    "enfant_avec_jour = []\n",
    "for enfant in 'GF':\n",
    "    for jour in 'lmMjvsd':\n",
    "        enfant_avec_jour.append((enfant, jour))\n",
    "\n",
    "des_enfants_avec_jour = set()\n",
    "for e1 in enfant_avec_jour:\n",
    "    for e2 in enfant_avec_jour:\n",
    "        for e3 in enfant_avec_jour:\n",
    "            for e4 in enfant_avec_jour:\n",
    "                for e5 in enfant_avec_jour:\n",
    "                    des_enfants_avec_jour.add((e1, e2, e3, e4, e5))\n",
    "\n",
    "assert 537824 == len(des_enfants_avec_jour)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "metadata": {
    "collapsed": false
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    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "10 loops, best of 3: 221 ms per loop\n"
     ]
    }
   ],
   "source": [
    "%%timeit -n10 pass\n",
    "\n",
    "enfant_avec_jour = [(e, j) for e in 'GF' for j in 'lmMjvsd']\n",
    "des_enfants_avec_jour = {(e1, e2, e3, e4, e5)\n",
    "                         for e1 in enfant_avec_jour\n",
    "                         for e2 in enfant_avec_jour\n",
    "                         for e3 in enfant_avec_jour\n",
    "                         for e4 in enfant_avec_jour\n",
    "                         for e5 in enfant_avec_jour}\n",
    "\n",
    "assert 537824 == len(des_enfants_avec_jour)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 3,
   "metadata": {
    "collapsed": false
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "10 loops, best of 3: 207 ms per loop\n"
     ]
    }
   ],
   "source": [
    "%%timeit -n10 from itertools import product\n",
    "\n",
    "des_enfants_avec_jour = set(product('GF', 'lmMjvsd', repeat=5))\n",
    "\n",
    "assert 537824 == len(des_enfants_avec_jour)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 4,
   "metadata": {
    "collapsed": false
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "10 loops, best of 3: 200 ms per loop\n"
     ]
    }
   ],
   "source": [
    "%%timeit -n10 from itertools import product, tee\n",
    "\n",
    "des_enfants_avec_jour = set(product(*tee(product('GF', 'lmMjvsd'), 5)))\n",
    "\n",
    "assert 537824 == len(des_enfants_avec_jour)"
   ]
  }
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