diff --git a/notebooks/Python_walkthrough.ipynb b/notebooks/Python_walkthrough.ipynb
index d39d31e..3ed90e8 100644
--- a/notebooks/Python_walkthrough.ipynb
+++ b/notebooks/Python_walkthrough.ipynb
@@ -1776,6 +1776,42 @@
     "coordinates.__dict__"
    ]
   },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "for deleting a field you can use"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 66,
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "namespace(x=268623.14, y=4804577.17, elev=251, zone='30T')"
+      ]
+     },
+     "execution_count": 66,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "del coordinates.info\n",
+    "\n",
+    "coordinates"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "or alternatively ``delattr(coordinates, 'info')``"
+   ]
+  },
   {
    "attachments": {},
    "cell_type": "markdown",
@@ -1799,7 +1835,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 66,
+   "execution_count": 67,
    "metadata": {},
    "outputs": [
     {
@@ -1822,7 +1858,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 67,
+   "execution_count": 68,
    "metadata": {},
    "outputs": [
     {
@@ -1853,7 +1889,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 68,
+   "execution_count": 69,
    "metadata": {},
    "outputs": [
     {
@@ -1862,7 +1898,7 @@
        "[1, 8, 27, 64]"
       ]
      },
-     "execution_count": 68,
+     "execution_count": 69,
      "metadata": {},
      "output_type": "execute_result"
     }
@@ -1888,7 +1924,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 69,
+   "execution_count": 70,
    "metadata": {},
    "outputs": [
     {
@@ -1909,7 +1945,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 70,
+   "execution_count": 71,
    "metadata": {},
    "outputs": [
     {
@@ -1918,7 +1954,7 @@
        "[1, 8, 27, 64]"
       ]
      },
-     "execution_count": 70,
+     "execution_count": 71,
      "metadata": {},
      "output_type": "execute_result"
     }
@@ -1947,7 +1983,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 71,
+   "execution_count": 72,
    "metadata": {},
    "outputs": [
     {
@@ -1986,7 +2022,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 72,
+   "execution_count": 73,
    "metadata": {},
    "outputs": [
     {
@@ -2036,7 +2072,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 73,
+   "execution_count": 74,
    "metadata": {},
    "outputs": [
     {
@@ -2045,7 +2081,7 @@
        "'2 is the smallest'"
       ]
      },
-     "execution_count": 73,
+     "execution_count": 74,
      "metadata": {},
      "output_type": "execute_result"
     }
@@ -2073,7 +2109,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 74,
+   "execution_count": 75,
    "metadata": {},
    "outputs": [],
    "source": [
@@ -2094,7 +2130,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 75,
+   "execution_count": 76,
    "metadata": {},
    "outputs": [
     {
@@ -2120,7 +2156,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 76,
+   "execution_count": 77,
    "metadata": {},
    "outputs": [
     {
@@ -2129,7 +2165,7 @@
        "True"
       ]
      },
-     "execution_count": 76,
+     "execution_count": 77,
      "metadata": {},
      "output_type": "execute_result"
     }
@@ -2140,7 +2176,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 77,
+   "execution_count": 78,
    "metadata": {},
    "outputs": [],
    "source": [
@@ -2163,7 +2199,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 78,
+   "execution_count": 79,
    "metadata": {},
    "outputs": [],
    "source": [
@@ -2173,7 +2209,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 79,
+   "execution_count": 80,
    "metadata": {},
    "outputs": [
     {
@@ -2182,7 +2218,7 @@
        "True"
       ]
      },
-     "execution_count": 79,
+     "execution_count": 80,
      "metadata": {},
      "output_type": "execute_result"
     }
@@ -2193,7 +2229,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 80,
+   "execution_count": 81,
    "metadata": {},
    "outputs": [
     {
@@ -2202,7 +2238,7 @@
        "False"
       ]
      },
-     "execution_count": 80,
+     "execution_count": 81,
      "metadata": {},
      "output_type": "execute_result"
     }
@@ -2213,7 +2249,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 81,
+   "execution_count": 82,
    "metadata": {},
    "outputs": [
     {
@@ -2222,7 +2258,7 @@
        "False"
       ]
      },
-     "execution_count": 81,
+     "execution_count": 82,
      "metadata": {},
      "output_type": "execute_result"
     }
@@ -2233,7 +2269,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 82,
+   "execution_count": 83,
    "metadata": {},
    "outputs": [
     {
@@ -2242,7 +2278,7 @@
        "True"
       ]
      },
-     "execution_count": 82,
+     "execution_count": 83,
      "metadata": {},
      "output_type": "execute_result"
     }
@@ -2254,7 +2290,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 83,
+   "execution_count": 84,
    "metadata": {},
    "outputs": [
     {
@@ -2263,7 +2299,7 @@
        "True"
       ]
      },
-     "execution_count": 83,
+     "execution_count": 84,
      "metadata": {},
      "output_type": "execute_result"
     }
@@ -2285,7 +2321,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 84,
+   "execution_count": 85,
    "metadata": {},
    "outputs": [
     {
@@ -2294,7 +2330,7 @@
        "(3.0, 1.5)"
       ]
      },
-     "execution_count": 84,
+     "execution_count": 85,
      "metadata": {},
      "output_type": "execute_result"
     }
@@ -2328,7 +2364,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 85,
+   "execution_count": 86,
    "metadata": {},
    "outputs": [
     {
@@ -2366,15 +2402,15 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 86,
+   "execution_count": 87,
    "metadata": {},
    "outputs": [
     {
      "name": "stdout",
      "output_type": "stream",
      "text": [
-      "Notebook tested in 2024-02-20 using:\n",
-      "Python 3.11.5 | packaged by Anaconda, Inc. | (main, Sep 11 2023, 13:16:22) [MSC v.1916 64 bit (AMD64)]\n"
+      "Notebook tested in 2024-04-02 using:\n",
+      "Python 3.11.8 | packaged by Anaconda, Inc. | (main, Feb 26 2024, 21:34:05) [MSC v.1916 64 bit (AMD64)]\n"
      ]
     }
    ],
@@ -2407,7 +2443,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.11.5"
+   "version": "3.11.8"
   }
  },
  "nbformat": 4,