OS X %matplotlib qt bug

OS X %matplotlib qt bug.ipynb

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 "worksheets": [
  {
   "cells": [
    {
     "cell_type": "markdown",
     "metadata": {},
     "source": [
      "Running the following cell immediately doesn't behave as expected."
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "%matplotlib qt\n",
      "from mayavi import mlab\n",
      "mlab.points3d(1, 1, 1)\n",
      "# if run first, cell never stops executing\n",
      "# manually killing the spawned process in the dock\n",
      "# causes the cell to return"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [],
     "trusted": true
    },
    {
     "cell_type": "markdown",
     "metadata": {},
     "source": [
      "Restart the kernel. Now try this instead"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "%matplotlib qt  # returns fine!"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [],
     "trusted": true
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "from mayavi import mlab\n",
      "mlab.points3d(1, 1, 1)\n",
      "# behaves as exepected.\n",
      "# can interact with the mlab view\n",
      "# and this cell returns"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [],
     "trusted": true
    },
    {
     "cell_type": "markdown",
     "metadata": {},
     "source": [
      "Note that this is run after `ipython notebook` on `OS X 10.9.1`. The following environment variables have been set: \n",
      "\n",
      "    QT_API=pyqt\n",
      "    ETS_TOOLKIT=qt4\n",
      "    \n",
      "Using IPython master, SHA: `9b8c058d4ef1667b292fea5e5a365aa545da6112`\n",
      "\n",
      "`pip list` shows:\n",
      "\n",
      "    matplotlib (1.4.x)\n",
      "    VTK (5.10.1)\n",
      "    mayavi (4.3.0)"
     ]
    }
   ],
   "metadata": {}
  }
 ]
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