Updat formatting of hovertool on images

Author: Leanne Guy

08a_Interactive_Image_Visualization.ipynb

@@ -372,16 +372,21 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "detections = hv.Points(coords).opts(\n",
-    "    fill_color=None, size = 9, color=\"darkorange\")\n",
-    "\n",
     "# Custom hover tool for the source detections\n",
     "detHoverTool = HoverTool(\n",
     "    tooltips=[\n",
-    "        ( 'X', '@x'),\n",
-    "        ( 'Y', '@y'),\n",
-    "    ]\n",
-    ")"
+    "        ( 'X', '@x{0.2f}'),\n",
+    "        ( 'Y', '@y{0.2f}'),\n",
+    "    ],\n",
+    "    formatters={\n",
+    "        'X' : 'printf',\n",
+    "        'Y' : 'printf',\n",
+    "    },\n",
+    "    \n",
+    ")\n",
+    "detections = hv.Points(coords).opts(\n",
+    "    fill_color=None, size = 9, color=\"darkorange\",\n",
+    "    tools=[detHoverTool])"
    ]
   },
   {
@@ -398,7 +403,7 @@
    "outputs": [],
    "source": [
     "# Reset the tools on the image and add a hover on the detections.\n",
-    "rasterize(img.opts(tools=[])) * detections.opts(tools=[detHoverTool])"
+    "rasterize(img).opts(tools=[]) * detections.opts(tools=[detHoverTool])"
    ]
   },
   {