Using Callback in iPython Bokeh v0.9.3 based off of this example ( http://bokeh.pydata.org/en/latest/docs/user_guide/interaction.html#cutomjs-for-widgets )

callback.ipynb

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    {
     "name": "stderr",
     "output_type": "stream",
     "text": [
      "ERROR: An unexpected error occurred while tokenizing input\n",
      "The following traceback may be corrupted or invalid\n",
      "The error message is: ('EOF in multi-line string', (1, 4))\n",
      "\n"
     ]
    },
    {
     "ename": "AttributeError",
     "evalue": "unexpected attribute 'code' to Callback, possible attributes are name, session or tags",
     "output_type": "error",
     "traceback": [
      "\u001b[1;31m---------------------------------------------------------------------------\u001b[0m",
      "\u001b[1;31mAttributeError\u001b[0m                            Traceback (most recent call last)",
      "\u001b[1;32m<ipython-input-1-a28bb88088a1>\u001b[0m in \u001b[0;36m<module>\u001b[1;34m()\u001b[0m\n\u001b[0;32m     22\u001b[0m         }\n\u001b[0;32m     23\u001b[0m         \u001b[0msource\u001b[0m\u001b[1;33m.\u001b[0m\u001b[0mtrigger\u001b[0m\u001b[1;33m(\u001b[0m\u001b[1;34m'change'\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m;\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[1;32m---> 24\u001b[1;33m     \"\"\")\n\u001b[0m\u001b[0;32m     25\u001b[0m \u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0;32m     26\u001b[0m \u001b[0mslider\u001b[0m \u001b[1;33m=\u001b[0m \u001b[0mSlider\u001b[0m\u001b[1;33m(\u001b[0m\u001b[0mstart\u001b[0m\u001b[1;33m=\u001b[0m\u001b[1;36m0.1\u001b[0m\u001b[1;33m,\u001b[0m \u001b[0mend\u001b[0m\u001b[1;33m=\u001b[0m\u001b[1;36m4\u001b[0m\u001b[1;33m,\u001b[0m \u001b[0mvalue\u001b[0m\u001b[1;33m=\u001b[0m\u001b[1;36m1\u001b[0m\u001b[1;33m,\u001b[0m \u001b[0mstep\u001b[0m\u001b[1;33m=\u001b[0m\u001b[1;36m.1\u001b[0m\u001b[1;33m,\u001b[0m \u001b[0mtitle\u001b[0m\u001b[1;33m=\u001b[0m\u001b[1;34m\"power\"\u001b[0m\u001b[1;33m,\u001b[0m \u001b[0mcallback\u001b[0m\u001b[1;33m=\u001b[0m\u001b[0mcallback\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n",
      "\u001b[1;32m/opt/conda/lib/python2.7/site-packages/bokeh/plot_object.pyc\u001b[0m in \u001b[0;36m__init__\u001b[1;34m(self, **kwargs)\u001b[0m\n\u001b[0;32m     88\u001b[0m \u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0;32m     89\u001b[0m         \u001b[1;32mif\u001b[0m \u001b[1;32mnot\u001b[0m \u001b[0mblock_events\u001b[0m\u001b[1;33m:\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[1;32m---> 90\u001b[1;33m             \u001b[0msuper\u001b[0m\u001b[1;33m(\u001b[0m\u001b[0mPlotObject\u001b[0m\u001b[1;33m,\u001b[0m \u001b[0mself\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m.\u001b[0m\u001b[0m__init__\u001b[0m\u001b[1;33m(\u001b[0m\u001b[1;33m**\u001b[0m\u001b[0mkwargs\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0m\u001b[0;32m     91\u001b[0m             \u001b[0mself\u001b[0m\u001b[1;33m.\u001b[0m\u001b[0msetup_events\u001b[0m\u001b[1;33m(\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0;32m     92\u001b[0m         \u001b[1;32melse\u001b[0m\u001b[1;33m:\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n",
      "\u001b[1;32m/opt/conda/lib/python2.7/site-packages/bokeh/properties.pyc\u001b[0m in \u001b[0;36m__init__\u001b[1;34m(self, **properties)\u001b[0m\n\u001b[0;32m    355\u001b[0m \u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0;32m    356\u001b[0m         \u001b[1;32mfor\u001b[0m \u001b[0mname\u001b[0m\u001b[1;33m,\u001b[0m \u001b[0mvalue\u001b[0m \u001b[1;32min\u001b[0m \u001b[0mproperties\u001b[0m\u001b[1;33m.\u001b[0m\u001b[0mitems\u001b[0m\u001b[1;33m(\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m:\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[1;32m--> 357\u001b[1;33m             \u001b[0msetattr\u001b[0m\u001b[1;33m(\u001b[0m\u001b[0mself\u001b[0m\u001b[1;33m,\u001b[0m \u001b[0mname\u001b[0m\u001b[1;33m,\u001b[0m \u001b[0mvalue\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0m\u001b[0;32m    358\u001b[0m \u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0;32m    359\u001b[0m     \u001b[1;32mdef\u001b[0m \u001b[0m__setattr__\u001b[0m\u001b[1;33m(\u001b[0m\u001b[0mself\u001b[0m\u001b[1;33m,\u001b[0m \u001b[0mname\u001b[0m\u001b[1;33m,\u001b[0m \u001b[0mvalue\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m:\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n",
      "\u001b[1;32m/opt/conda/lib/python2.7/site-packages/bokeh/properties.pyc\u001b[0m in \u001b[0;36m__setattr__\u001b[1;34m(self, name, value)\u001b[0m\n\u001b[0;32m    369\u001b[0m \u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0;32m    370\u001b[0m             raise AttributeError(\"unexpected attribute '%s' to %s, %s attributes are %s\" %\n\u001b[1;32m--> 371\u001b[1;33m                 (name, self.__class__.__name__, text, nice_join(matches)))\n\u001b[0m\u001b[0;32m    372\u001b[0m \u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0;32m    373\u001b[0m     \u001b[1;32mdef\u001b[0m \u001b[0mclone\u001b[0m\u001b[1;33m(\u001b[0m\u001b[0mself\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m:\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n",
      "\u001b[1;31mAttributeError\u001b[0m: unexpected attribute 'code' to Callback, possible attributes are name, session or tags"
     ]
    }
   ],
   "source": [
    "from bokeh.io import vform\n",
    "from bokeh.models import Callback, ColumnDataSource, Slider\n",
    "from bokeh.plotting import figure, output_file, show\n",
    "\n",
    "output_file(\"callback.html\")\n",
    "\n",
    "x = [x*0.005 for x in range(0, 200)]\n",
    "y = x\n",
    "\n",
    "source = ColumnDataSource(data=dict(x=x, y=y))\n",
    "\n",
    "plot = figure(plot_width=400, plot_height=400)\n",
    "plot.line('x', 'y', source=source, line_width=3, line_alpha=0.6)\n",
    "\n",
    "callback = Callback(args=dict(source=source), code=\"\"\"\n",
    "        var data = source.get('data');\n",
    "        var f = cb_obj.get('value')\n",
    "        x = data['x']\n",
    "        y = data['y']\n",
    "        for (i = 0; i < x.length; i++) {\n",
    "            y[i] = Math.pow(x[i], f)\n",
    "        }\n",
    "        source.trigger('change');\n",
    "    \"\"\")\n",
    "\n",
    "slider = Slider(start=0.1, end=4, value=1, step=.1, title=\"power\", callback=callback)\n",
    "\n",
    "layout = vform(slider, plot)\n",
    "\n",
    "show(layout)"
   ]
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