CustomControlLoopEvents.ipynb

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   "source": [
    "from zmq.eventloop import IOLoop\n",
    "\n",
    "class NamedControlCallbacks(dict):\n",
    "    def __init__(self, start=True):\n",
    "        if start:\n",
    "            self.start()\n",
    "        else:\n",
    "            self.stop()\n",
    "\n",
    "    def start(self):\n",
    "        self.running = True\n",
    "        IOLoop.instance().add_callback(self._loop)\n",
    "        \n",
    "    def stop(self):\n",
    "        self.running = False\n",
    "        \n",
    "    def do_one_iteration(self):\n",
    "        for callback in self.values():\n",
    "            callback()\n",
    "\n",
    "    def _loop(self):\n",
    "        self.do_one_iteration()\n",
    "        if self.running:\n",
    "            IOLoop.instance().add_callback(self._loop)\n",
    "\n",
    "    def __del__(self):\n",
    "        self.stop()\n"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": [
    "a = NamedControlCallbacks()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 3,
   "metadata": {
    "collapsed": false
   },
   "outputs": [],
   "source": [
    "x = 0\n",
    "def inc():\n",
    "    global x\n",
    "    x += 1\n",
    "a['bob'] = inc"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 27,
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    {
     "data": {
      "text/plain": [
       "945759"
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     "execution_count": 27,
     "metadata": {},
     "output_type": "execute_result"
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   "source": [
    "x"
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   "cell_type": "code",
   "execution_count": 25,
   "metadata": {
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   "outputs": [],
   "source": [
    "a.stop()"
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  },
  {
   "cell_type": "code",
   "execution_count": 11,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": [
    "a.do_one_iteration()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 14,
   "metadata": {
    "collapsed": false
   },
   "outputs": [],
   "source": [
    "a.start()"
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  },
  {
   "cell_type": "code",
   "execution_count": 17,
   "metadata": {
    "collapsed": false
   },
   "outputs": [],
   "source": [
    "del a['bob']"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 20,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": [
    "a['bob'] = inc"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": []
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