diff --git a/my_file.txt b/my_file.txt
new file mode 100644
index 0000000..34c92c2
--- /dev/null
+++ b/my_file.txt
@@ -0,0 +1 @@
+lorem ipsum
\ No newline at end of file
diff --git a/notebooks/02_03b.ipynb b/notebooks/02_03b.ipynb
index ebef0a1..2985460 100644
--- a/notebooks/02_03b.ipynb
+++ b/notebooks/02_03b.ipynb
@@ -17,19 +17,13 @@
      "name": "stdout",
      "output_type": "stream",
      "text": [
-      "Requirement already satisfied: numpy in /home/codespace/.local/lib/python3.10/site-packages (1.26.1)\n",
-      "\n",
-      "\u001b[1m[\u001b[0m\u001b[34;49mnotice\u001b[0m\u001b[1;39;49m]\u001b[0m\u001b[39;49m A new release of pip is available: \u001b[0m\u001b[31;49m23.3\u001b[0m\u001b[39;49m -> \u001b[0m\u001b[32;49m23.3.1\u001b[0m\n",
-      "\u001b[1m[\u001b[0m\u001b[34;49mnotice\u001b[0m\u001b[1;39;49m]\u001b[0m\u001b[39;49m To update, run: \u001b[0m\u001b[32;49mpython -m pip install --upgrade pip\u001b[0m\n",
-      "Requirement already satisfied: pandas in /home/codespace/.local/lib/python3.10/site-packages (2.1.1)\n",
-      "Requirement already satisfied: numpy>=1.22.4 in /home/codespace/.local/lib/python3.10/site-packages (from pandas) (1.26.1)\n",
-      "Requirement already satisfied: python-dateutil>=2.8.2 in /home/codespace/.local/lib/python3.10/site-packages (from pandas) (2.8.2)\n",
-      "Requirement already satisfied: pytz>=2020.1 in /home/codespace/.local/lib/python3.10/site-packages (from pandas) (2023.3.post1)\n",
-      "Requirement already satisfied: tzdata>=2022.1 in /home/codespace/.local/lib/python3.10/site-packages (from pandas) (2023.3)\n",
-      "Requirement already satisfied: six>=1.5 in /home/codespace/.local/lib/python3.10/site-packages (from python-dateutil>=2.8.2->pandas) (1.16.0)\n",
-      "\n",
-      "\u001b[1m[\u001b[0m\u001b[34;49mnotice\u001b[0m\u001b[1;39;49m]\u001b[0m\u001b[39;49m A new release of pip is available: \u001b[0m\u001b[31;49m23.3\u001b[0m\u001b[39;49m -> \u001b[0m\u001b[32;49m23.3.1\u001b[0m\n",
-      "\u001b[1m[\u001b[0m\u001b[34;49mnotice\u001b[0m\u001b[1;39;49m]\u001b[0m\u001b[39;49m To update, run: \u001b[0m\u001b[32;49mpython -m pip install --upgrade pip\u001b[0m\n"
+      "Requirement already satisfied: numpy in /home/codespace/.local/lib/python3.12/site-packages (2.3.1)\n",
+      "Requirement already satisfied: pandas in /home/codespace/.local/lib/python3.12/site-packages (2.3.1)\n",
+      "Requirement already satisfied: numpy>=1.26.0 in /home/codespace/.local/lib/python3.12/site-packages (from pandas) (2.3.1)\n",
+      "Requirement already satisfied: python-dateutil>=2.8.2 in /home/codespace/.local/lib/python3.12/site-packages (from pandas) (2.9.0.post0)\n",
+      "Requirement already satisfied: pytz>=2020.1 in /home/codespace/.local/lib/python3.12/site-packages (from pandas) (2025.2)\n",
+      "Requirement already satisfied: tzdata>=2022.7 in /home/codespace/.local/lib/python3.12/site-packages (from pandas) (2025.2)\n",
+      "Requirement already satisfied: six>=1.5 in /home/codespace/.local/lib/python3.12/site-packages (from python-dateutil>=2.8.2->pandas) (1.17.0)\n"
      ]
     }
    ],
@@ -53,7 +47,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 13,
+   "execution_count": 4,
    "id": "bbba446d",
    "metadata": {},
    "outputs": [
@@ -162,7 +156,7 @@
        "row 10        81        84        87"
       ]
      },
-     "execution_count": 13,
+     "execution_count": 4,
      "metadata": {},
      "output_type": "execute_result"
     }
@@ -172,6 +166,27 @@
     "numbers_df"
    ]
   },
+  {
+   "cell_type": "code",
+   "execution_count": 6,
+   "id": "d20042b1",
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "np.int64(3)"
+      ]
+     },
+     "execution_count": 6,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "numbers_df.iloc[0,1]"
+   ]
+  },
   {
    "cell_type": "markdown",
    "id": "68b700fd-5320-47e2-852c-a13aab49a486",
@@ -197,7 +212,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.10.8"
+   "version": "3.12.1"
   }
  },
  "nbformat": 4,