parnumeric
diff --git a/‎Intermediate.ipynb‎
Lines changed: 82 additions & 13 deletions b/‎Intermediate.ipynb‎
Lines changed: 82 additions & 13 deletions
@@ -4470,29 +4470,33 @@
   },
   {
    "cell_type": "markdown",
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+   "id": "dc4b7323-f4f7-4b51-b6da-f651abf5029e",
    "metadata": {
     "editable": false,
     "slideshow": {
-     "slide_type": "slide"
+     "slide_type": ""
     },
     "tags": []
    },
    "source": [
-    "## Importing _modules_"
+    "Modules let us:\n",
+    "- Use code that others have already written and tested\n",
+    "- Load in only the functionality we need\n",
+    "- Know exactly where a piece of functionality comes from"
    ]
   },
   {
    "cell_type": "markdown",
-   "id": "eed64626",
+   "id": "9e1c43a8",
    "metadata": {
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     "slideshow": {
-     "slide_type": ""
-    }
+     "slide_type": "slide"
+    },
+    "tags": []
    },
    "source": [
-    "Python comes with hundreds of _modules_ doing all sorts of things. Also, many 3rd-party modules are available to download from the Internet."
+    "## Importing _modules_"
    ]
   },
   {
@@ -4502,7 +4506,8 @@
     "editable": false,
     "slideshow": {
      "slide_type": ""
-    }
+    },
+    "tags": []
    },
    "source": [
     "There are several ways of importing _modules_:"
@@ -4601,6 +4606,71 @@
     "print(square_root(25))"
    ]
   },
+  {
+   "cell_type": "markdown",
+   "id": "04bec6e4-8e4d-4899-a3c3-c9abd332f275",
+   "metadata": {
+    "editable": false,
+    "slideshow": {
+     "slide_type": "slide"
+    },
+    "tags": []
+   },
+   "source": [
+    "## Why Namespaces Matter\n",
+    "\n",
+    "The word `log` means two very different things:"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "4de72e4c-2795-4b4d-8542-10729a74f44a",
+   "metadata": {
+    "editable": true,
+    "slideshow": {
+     "slide_type": ""
+    },
+    "tags": []
+   },
+   "outputs": [],
+   "source": [
+    "import logging\n",
+    "\n",
+    "math.log(100, 10)          # A logarithm: 2.0\n",
+    "\n",
+    "logging.log(20, \"Hello\")   # A logbook entry: records a message"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "36f46ead-b9a1-481f-8798-edbfc58b5504",
+   "metadata": {
+    "editable": false,
+    "slideshow": {
+     "slide_type": ""
+    },
+    "tags": []
+   },
+   "source": [
+    "Without namespaces, Python, and your reader, couldn't tell them apart."
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "fbf736e6-8dfb-4a00-86fb-5e71de650e9f",
+   "metadata": {
+    "editable": false,
+    "slideshow": {
+     "slide_type": "fragment"
+    },
+    "tags": []
+   },
+   "source": [
+    "----\n",
+    "This is why importing a whole module into namespace is usually a bad idea:"
+   ]
+  },
   {
    "cell_type": "code",
    "execution_count": null,
@@ -4614,10 +4684,9 @@
    },
    "outputs": [],
    "source": [
-    "# import all functions, variables, and classes from a module into the global namespace\n",
-    "# - better to avoid this as some names from the module can interfere with your own variable names in the global namespace\n",
+    "# import all functions, variables, and classes from a module - better to avoid this\n",
     "from math import *\n",
-    "print(int(sqrt(4.0)))"
+    "print(sqrt(4.0))"
    ]
   },
   {
@@ -4626,12 +4695,12 @@
    "metadata": {
     "editable": false,
     "slideshow": {
-     "slide_type": "fragment"
+     "slide_type": "slide"
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    "source": [
-    "---\n",
+    "## Getting help\n",
     "To get help on a module at the Python shell, import it the whole (the very first way), then you can..."
    ]
   },