Fix datetime.UTC issue

Author: edoardob90

12_functions_advanced.ipynb

@@ -335,10 +335,10 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "from datetime import datetime\n",
+    "from datetime import datetime, UTC\n",
     "\n",
     "\n",
-    "def log(msg, *, dt=datetime.utcnow()):\n",
+    "def log(msg, *, dt=datetime.now(UTC)):\n",
     "    print(f\"{dt}: {msg}\")"
    ]
   },
@@ -362,9 +362,9 @@
    "source": [
     "from time import sleep\n",
     "\n",
-    "log(\"my first message\")\n",
+    "log(\"A first message\")\n",
     "sleep(5)\n",
-    "log(\"my first message\")"
+    "log(\"A second message\")"
    ]
   },
   {
@@ -395,7 +395,7 @@
    "outputs": [],
    "source": [
     "def log(msg, *, dt=None):\n",
-    "    dt = dt or datetime.now(datetime.timezone.utc)\n",
+    "    dt = dt or datetime.now(UTC)\n",
     "    print(f\"{dt}: {msg}\")"
    ]
   },
@@ -408,9 +408,9 @@
    },
    "outputs": [],
    "source": [
-    "log(\"my first message\")\n",
+    "log(\"A first message\")\n",
     "sleep(5)\n",
-    "log(\"my first message\")"
+    "log(\"A second message\")"
    ]
   },
   {