{"cells":[
 {
  "cell_type": "code",
  "execution_count": null,
  "metadata": {
   "collapsed": false
  },
  "outputs": [],
  "source": "import random\nimport numpy as np\nimport pandas as pd"
 },
 {
  "cell_type": "code",
  "execution_count": null,
  "metadata": {
   "collapsed": false
  },
  "outputs": [],
  "source": "filename = \"../input/train.csv\"\n\ndef file_len(filename):\n    with open(filename) as f:\n        for i, l in enumerate(f):\n            pass\n    return i + 1\n\nn = file_len(filename)\n\nprint(n)\n\ns = 500000\nskip = sorted(random.sample(range(1, n), n-s))\n\ntrain_sample = pd.read_csv(filename, skiprows=skip)"
 },
 {
  "cell_type": "code",
  "execution_count": null,
  "metadata": {
   "collapsed": false
  },
  "outputs": [],
  "source": "train_sample.describe()"
 },
 {
  "cell_type": "code",
  "execution_count": null,
  "metadata": {
   "collapsed": false
  },
  "outputs": [],
  "source": ""
 },
 {
  "cell_type": "code",
  "execution_count": null,
  "metadata": {
   "collapsed": false
  },
  "outputs": [],
  "source": ""
 }
],"metadata":{"kernelspec":{"display_name":"Python 3","language":"python","name":"python3"}}, "nbformat": 4, "nbformat_minor": 0}