add try/except block to catch namespaces larger than 10k

Author: junefish

learn/experimental/merge-namespaces/merge-namespaces.ipynb

@@ -75,7 +75,13 @@
     "dimension = index.describe_index_stats()['dimension']\n",
     "# Function to fetch all vectors from a namespace\n",
     "def fetch_all_vectors(namespace):\n",
-    "    count = index.describe_index_stats()['namespaces'][namespace]['vector_count']\n",
+    "    try:\n",
+    "      count = index.describe_index_stats()['namespaces'][namespace]['vector_count']\n",
+    "      if count > 10000:\n",
+    "          raise ValueError(\"Namespaces larger than 10000 vectors need to be handled iteratively.\")\n",
+    "    except ValueError as e:\n",
+    "        print(f\"Error: {e}\")\n",
+    "        return []\n",
     "    random_vecs = [random.random() for _ in range(dimension)]\n",
     "    response = index.query(\n",
     "        namespace=namespace,\n",