thread-exceptions.ipynb

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  {
   "cell_type": "code",
   "execution_count": 1,
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   "source": [
    "import threading\n",
    "import sys\n",
    "import traceback"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "metadata": {
    "collapsed": true
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   "source": [
    "class MyThread(threading.Thread):\n",
    "    def run(self):\n",
    "        try:\n",
    "            # Do whatever you need to do\n",
    "            super(MyThread, self).run()\n",
    "        except Exception:\n",
    "            self.exc_info = sys.exc_info()\n",
    "            raise\n",
    "            \n",
    "    def print_exception(self):\n",
    "        exc_info = getattr(self, 'exc_info', None)\n",
    "        if exc_info:\n",
    "            traceback.print_exception(*exc_info)\n",
    "        else:\n",
    "            print(\"no exception occured\")\n",
    "            \n",
    "    "
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 3,
   "metadata": {
    "collapsed": false
   },
   "outputs": [
    {
     "name": "stderr",
     "output_type": "stream",
     "text": [
      "Exception in thread Thread-4:\n",
      "Traceback (most recent call last):\n",
      "  File \"/Users/tillhoffmann/miniconda3/envs/survey/lib/python3.5/threading.py\", line 914, in _bootstrap_inner\n",
      "    self.run()\n",
      "  File \"<ipython-input-2-1ed5dc0ce6fa>\", line 5, in run\n",
      "    super(MyThread, self).run()\n",
      "  File \"/Users/tillhoffmann/miniconda3/envs/survey/lib/python3.5/threading.py\", line 862, in run\n",
      "    self._target(*self._args, **self._kwargs)\n",
      "  File \"<ipython-input-3-dcb00ee6cf60>\", line 1, in <lambda>\n",
      "    t = MyThread(target=lambda: 1 / 0)\n",
      "ZeroDivisionError: division by zero\n",
      "\n"
     ]
    }
   ],
   "source": [
    "t = MyThread(target=lambda: 1 / 0)\n",
    "t.start()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 4,
   "metadata": {
    "collapsed": false
   },
   "outputs": [
    {
     "name": "stderr",
     "output_type": "stream",
     "text": [
      "Traceback (most recent call last):\n",
      "  File \"<ipython-input-2-1ed5dc0ce6fa>\", line 5, in run\n",
      "    super(MyThread, self).run()\n",
      "  File \"/Users/tillhoffmann/miniconda3/envs/survey/lib/python3.5/threading.py\", line 862, in run\n",
      "    self._target(*self._args, **self._kwargs)\n",
      "  File \"<ipython-input-3-dcb00ee6cf60>\", line 1, in <lambda>\n",
      "    t = MyThread(target=lambda: 1 / 0)\n",
      "ZeroDivisionError: division by zero\n"
     ]
    }
   ],
   "source": [
    "t.print_exception()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 5,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": [
    "t = MyThread(target=lambda: 1 / 2)\n",
    "t.start()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 6,
   "metadata": {
    "collapsed": false
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "no exception occured\n"
     ]
    }
   ],
   "source": [
    "t.print_exception()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": []
  }
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