fix image download for tut 46 (#411)

Author: anakin87

tutorials/46_Multimodal_RAG.ipynb

@@ -120,7 +120,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 3,
+   "execution_count": null,
    "id": "45ff5def-ce04-42fd-a375-ae80e91c91f2",
    "metadata": {
     "colab": {
@@ -143,10 +143,13 @@
     }
    ],
    "source": [
-    "from urllib.request import urlretrieve\n",
+    "from urllib.request import URLopener\n",
+    "\n",
+    "url_opener = URLopener()\n",
+    "url_opener.addheader(\"User-Agent\", \"Mozilla/5.0\")\n",
     "\n",
-    "urlretrieve(\"https://upload.wikimedia.org/wikipedia/commons/2/26/Pink_Lady_Apple_%284107712628%29.jpg\", \"apple.jpg\")\n",
-    "urlretrieve(\"https://upload.wikimedia.org/wikipedia/commons/thumb/e/e1/Cattle_tyrant_%28Machetornis_rixosa%29_on_Capybara.jpg/960px-Cattle_tyrant_%28Machetornis_rixosa%29_on_Capybara.jpg?download\", \"capybara.jpg\")"
+    "url_opener.retrieve(\"https://upload.wikimedia.org/wikipedia/commons/2/26/Pink_Lady_Apple_%284107712628%29.jpg?download\", \"apple.jpg\")\n",
+    "url_opener.retrieve(\"https://upload.wikimedia.org/wikipedia/commons/thumb/e/e1/Cattle_tyrant_%28Machetornis_rixosa%29_on_Capybara.jpg/960px-Cattle_tyrant_%28Machetornis_rixosa%29_on_Capybara.jpg?download\", \"capybara.jpg\")"
    ]
   },
   {
@@ -325,7 +328,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 9,
+   "execution_count": null,
    "id": "5d723c01-6fc8-40be-ba19-b2e7f98e8c81",
    "metadata": {
     "colab": {
@@ -347,9 +350,12 @@
     }
    ],
    "source": [
-    "from urllib.request import urlretrieve\n",
+    "from urllib.request import URLopener\n",
+    "\n",
+    "url_opener = URLopener()\n",
+    "url_opener.addheader(\"User-Agent\", \"Mozilla/5.0\")\n",
     "\n",
-    "urlretrieve(\"https://arxiv.org/pdf/1706.03762.pdf\", \"attention_is_all_you_need.pdf\")"
+    "url_opener.retrieve(\"https://arxiv.org/pdf/1706.03762\", \"attention_is_all_you_need.pdf\")"
    ]
   },
   {
@@ -1550,4 +1556,4 @@
  },
  "nbformat": 4,
  "nbformat_minor": 5
-}
+}