parnumeric
diff --git a/‎Intermediate.ipynb‎
Lines changed: 2 additions & 121 deletions b/‎Intermediate.ipynb‎
Lines changed: 2 additions & 121 deletions
@@ -4848,8 +4848,8 @@
    },
    "source": [
     "These methods help you locate substrings within a string, returning their position or checking for their presence:\n",
-    "* `index()` - returns `-1` if the substring is not found\n",
-    "* `find()` - raises a `ValueError` if the substring is not found"
+    "* `index()`\n",
+    "* `find()`"
    ]
   },
   {
@@ -4886,38 +4886,6 @@
     "print(line.find('wombat'))"
    ]
   },
-  {
-   "cell_type": "markdown",
-   "id": "714fc569",
-   "metadata": {
-    "editable": false,
-    "slideshow": {
-     "slide_type": ""
-    }
-   },
-   "source": [
-    "The key difference is how they handle missing substrings - `find()` returns `-1` while `index()` raises an exception:"
-   ]
-  },
-  {
-   "cell_type": "code",
-   "execution_count": null,
-   "id": "fc5a28ef-8a31-434a-a653-1662cc274945",
-   "metadata": {
-    "editable": true,
-    "slideshow": {
-     "slide_type": ""
-    },
-    "tags": []
-   },
-   "outputs": [],
-   "source": [
-    "try:\n",
-    "    print(line.index('wombat'))\n",
-    "except ValueError:\n",
-    "    print(\"A wombat isn't mentioned in the text\")"
-   ]
-  },
   {
    "cell_type": "markdown",
    "id": "40d4c38b-9a07-4e49-a9b3-003dd13f129d",
@@ -5106,59 +5074,6 @@
     "print(f\"Cleaned:  '{email}'\")"
    ]
   },
-  {
-   "cell_type": "markdown",
-   "id": "2fd63835",
-   "metadata": {
-    "editable": false,
-    "slideshow": {
-     "slide_type": "slide"
-    }
-   },
-   "source": [
-    "These methods work with any string and don't raise exceptions, but you may want to validate the results."
-   ]
-  },
-  {
-   "cell_type": "code",
-   "execution_count": null,
-   "id": "8f1ceba1",
-   "metadata": {},
-   "outputs": [],
-   "source": [
-    "# Transforming methods don't raise exceptions, but you can validate transformed results\n",
-    "def process_username(username):\n",
-    "    \"\"\"Process and validate a username.\"\"\"\n",
-    "    if not isinstance(username, str):\n",
-    "        raise TypeError(f\"Username must be a string, got {type(username).__name__}\")\n",
-    "    \n",
-    "    # Transform: strip whitespace and convert to lowercase\n",
-    "    processed = username.strip().lower()\n",
-    "    \n",
-    "    # Validate the result\n",
-    "    if not processed:\n",
-    "        raise ValueError(\"Username cannot be empty after processing\")\n",
-    "    \n",
-    "    if len(processed) < 3:\n",
-    "        raise ValueError(f\"Username must be at least 3 characters, got {len(processed)}\")\n",
-    "    \n",
-    "    return processed\n",
-    "\n",
-    "# Valid case\n",
-    "try:\n",
-    "    result = process_username(\"  JohnDoe  \")\n",
-    "    print(f\"\u2713 Processed username: '{result}'\")\n",
-    "except ValueError as e:\n",
-    "    print(f\"Error: {e}\")\n",
-    "\n",
-    "# Invalid case\n",
-    "try:\n",
-    "    result = process_username(\"  AB  \")\n",
-    "    print(f\"\u2713 Processed username: '{result}'\")\n",
-    "except ValueError as e:\n",
-    "    print(f\"Error: {e}\")"
-   ]
-  },
   {
    "cell_type": "markdown",
    "id": "6cf8076f-8f50-49ae-b558-39336c323880",
@@ -5258,40 +5173,6 @@
     "print(\"\\n\".join(line_list))"
    ]
   },
-  {
-   "cell_type": "markdown",
-   "id": "0deaf239",
-   "metadata": {
-    "editable": false,
-    "slideshow": {
-     "slide_type": ""
-    }
-   },
-   "source": [
-    "`join()` will raise a `TypeError` if the iterable contains non-string elements"
-   ]
-  },
-  {
-   "cell_type": "code",
-   "execution_count": null,
-   "id": "225bdd40",
-   "metadata": {
-    "editable": true,
-    "slideshow": {
-     "slide_type": ""
-    },
-    "tags": []
-   },
-   "outputs": [],
-   "source": [
-    "flags = [16384,1048576]\n",
-    "\n",
-    "for i in range(len(flags)):\n",
-    "    flags_str = \"+\".join(flags[i])\n",
-    "#flags_str = \"+\".join(str(flag) for flag in flags)\n",
-    "#print(flags_str)"
-   ]
-  },
   {
    "cell_type": "markdown",
    "id": "a965b5d9-59f4-4ed5-b7e9-89f5f0bcf60f",