Prayer Partner Generator.ipynb

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    "# Implement round-robin tournament scheduling for prayer partners\n",
    "# https://en.wikipedia.org/wiki/Round-robin_tournament#Scheduling_algorithm\n",
    "\n",
    "import csv\n",
    "bros= []\n",
    "with open('/Users/billyeh/bros.csv') as f:\n",
    "    r = csv.reader(f, delimiter=',', quotechar='\"')\n",
    "    for row in r:\n",
    "        bros.append(row[0])\n",
    "\n",
    "print(len(bros))\n",
    "bros"
   ]
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   "cell_type": "code",
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    "from collections import defaultdict\n",
    "pairs = defaultdict(lambda: defaultdict(lambda: ''))\n",
    "half = len(bros) / 2\n",
    "bracket = [bros[:half], list(reversed(bros[half:]))]\n",
    "num_partners = len(bros) - 1\n",
    "\n",
    "def rotate_bracket(b):\n",
    "    first_row = b[0]\n",
    "    second_row = b[1]\n",
    "    first_row.insert(1, second_row.pop(0))\n",
    "    second_row.append(first_row.pop())\n",
    "\n",
    "pairs = defaultdict(list)\n",
    "for _ in range(num_partners):\n",
    "    for i, bro in enumerate(bracket[0]):\n",
    "        partner = bracket[1][i]\n",
    "        pairs[bro].append(partner)\n",
    "        pairs[partner].append(bro)\n",
    "    rotate_bracket(bracket)\n",
    "\n",
    "# sanity check\n",
    "for bro, partners in pairs.items():\n",
    "    if len(partners) != num_partners:\n",
    "        print(bro)\n",
    "    for b in bros:\n",
    "        if b != bro and b not in partners:\n",
    "            print(bro, b)\n",
    "    for i, partner in enumerate(partners):\n",
    "        if pairs[partner][i] != bro:\n",
    "            print(partner, bro)\n",
    "pairs"
   ]
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   "cell_type": "code",
   "execution_count": null,
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    "def get_name(p):\n",
    "    return ' '.join(p.split()[:-1])\n",
    "\n",
    "def chunks(l, n):\n",
    "    for i in range(0, len(l), n):\n",
    "        yield l[i:i + n]\n",
    "\n",
    "CHUNK_SIZE = 2\n",
    "\n",
    "with open('/Users/billyeh/out.csv', 'w') as f:\n",
    "    w = csv.writer(f)\n",
    "    for bro, partners in sorted(pairs.items()):\n",
    "        p = []\n",
    "        partner_chunks = chunks(partners, CHUNK_SIZE)\n",
    "        for c in partner_chunks:\n",
    "            p.append('; '.join([get_name(b) for b in c]))\n",
    "        w.writerow([bro] + p)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": []
  }
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