From bba744b1ce06684918a3b692b87596e9ce5e754f Mon Sep 17 00:00:00 2001
From: "James A. Bednar" <jbednar@continuum.io>
Date: Mon, 1 Jun 2020 23:49:16 -0500
Subject: [PATCH] Fixed exercise 3 callbacks

---
 examples/tutorial/exercises/Plotting.ipynb | 21 +++++++++++----------
 1 file changed, 11 insertions(+), 10 deletions(-)

diff --git a/examples/tutorial/exercises/Plotting.ipynb b/examples/tutorial/exercises/Plotting.ipynb
index 59ccaad1..cf41a57d 100644
--- a/examples/tutorial/exercises/Plotting.ipynb
+++ b/examples/tutorial/exercises/Plotting.ipynb
@@ -36,6 +36,7 @@
     "import hvplot.xarray # noqa: adds hvplot method to xarray objects\n",
     "\n",
     "df = dd.read_parquet('../../data/earthquakes.parq')\n",
+    "df.time = df.time.astype('datetime64[ns]')\n",
     "cleaned_df = df.copy()\n",
     "cleaned_df['mag'] = df.mag.where(df.mag > 0)\n",
     "cleaned_reindexed_df = cleaned_df.set_index(cleaned_df.time)\n",
@@ -248,13 +249,13 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "def circles_callback(indices):\n",
+    "def circles_callback(index):\n",
     "    circles = []\n",
-    "    if len(indices) == 0:\n",
+    "    if len(index) == 0:\n",
     "        return  hv.Overlay([])\n",
     "    \n",
-    "    for index in indices:\n",
-    "        row = most_severe.iloc[index] # noqa\n",
+    "    for i in index:\n",
+    "        row = most_severe.iloc[i] # noqa\n",
     "        circle = ...  # Define the appropriate Ellipse element here\n",
     "        circles.append(circle)\n",
     "    return hv.Overlay(circles)\n",
@@ -270,13 +271,13 @@
     "<details><summary>Solution</summary><br>\n",
     "\n",
     "```python\n",
-    "def circles_callback(indices):\n",
+    "def circles_callback(index):\n",
     "    circles = []\n",
-    "    if len(indices) == 0:\n",
+    "    if len(index) == 0:\n",
     "        return  hv.Overlay([])\n",
     "    \n",
-    "    for index in indices:\n",
-    "        row = most_severe.iloc[index]\n",
+    "    for i in index:\n",
+    "        row = most_severe.iloc[i]\n",
     "        circle = hv.Ellipse(row.longitude, row.latitude, 10) \n",
     "        circles.append(circle)\n",
     "    \n",
@@ -394,8 +395,8 @@
     "    circles = []\n",
     "    if len(index) == 0:\n",
     "        return  hv.Overlay([])\n",
-    "    for ind in index:\n",
-    "        row = most_severe.iloc[ind]\n",
+    "    for i in index:\n",
+    "        row = most_severe.iloc[i]\n",
     "        circle = hv.Ellipse(row.longitude, row.latitude, 10) # Define the appropriate Ellipse element here\n",
     "        circles.append(circle)\n",
     "    \n",