add links to pinecone and add env var to index

examples/How_to_build_a_tool-using_agent_with_Langchain.ipynb

@@ -54,7 +54,7 @@
    "source": [
     "# Setup\n",
     "\n",
-    "Import libraries and set up a connection to a Pinecone vector database.\n",
+    "Import libraries and set up a connection to a [Pinecone](https://www.pinecone.io) vector database.\n",
     "\n",
     "You can substitute Pinecone for any other vectorstore or database - there are a [selection](https://python.langchain.com/en/latest/modules/indexes/vectorstores.html) that are supported by Langchain natively, while other connectors will need to be developed yourself."
    ]
@@ -66,11 +66,13 @@
    "metadata": {},
    "outputs": [],
    "source": [
+    "!pip install openai\n",
     "!pip install pinecone-client\n",
     "!pip install pandas\n",
     "!pip install typing\n",
     "!pip install tqdm\n",
-    "!pip install langchain"
+    "!pip install langchain\n",
+    "!pip install wget"
    ]
   },
   {
@@ -109,6 +111,15 @@
     "index_name = 'podcasts'"
    ]
   },
+  {
+   "attachments": {},
+   "cell_type": "markdown",
+   "id": "9c85f298",
+   "metadata": {},
+   "source": [
+    "For acquiring an API key to connect with Pinecone, you can set up a [free account](https://app.pinecone.io/) and store it in the `api_key` variable below or in your environment variables under `PINECONE_API_KEY`"
+   ]
+  },
   {
    "cell_type": "code",
    "execution_count": 4,
@@ -116,8 +127,13 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "api_key = os.getenv(\"PINECONE_API_KEY\")\n",
-    "pinecone.init(api_key=api_key)"
+    "api_key = os.getenv(\"PINECONE_API_KEY\") or \"PINECONE_API_KEY\"\n",
+    "\n",
+    "# find environment next to your API key in the Pinecone console\n",
+    "env = os.getenv(\"PINECONE_ENVIRONMENT\") or \"PINECONE_ENVIRONMENT\"\n",
+    "\n",
+    "pinecone.init(api_key=api_key, environment=env)\n",
+    "pinecone.whoami()"
    ]
   },
   {