clean nbs and fix tests

Author: KeremTurgutlu

nbs/00_core.ipynb

@@ -2511,38 +2511,12 @@
   {
    "cell_type": "code",
    "execution_count": null,
-   "id": "d95e5fe1",
+   "id": "84f37879",
    "metadata": {},
-   "outputs": [
-    {
-     "data": {
-      "text/markdown": [
-       "Hello! How can I help you today?\n",
-       "\n",
-       "<details>\n",
-       "\n",
-       "- id: `gen-1763024814-TLZkWYERo4bGvTBZ8YjO`\n",
-       "- model: `openai/gpt-oss-20b`\n",
-       "- finish_reason: `stop`\n",
-       "- usage: `Usage(completion_tokens=57, prompt_tokens=70, total_tokens=127, completion_tokens_details=None, prompt_tokens_details=None)`\n",
-       "\n",
-       "</details>"
-      ],
-      "text/plain": [
-       "ModelResponse(id='gen-1763024814-TLZkWYERo4bGvTBZ8YjO', created=1763024814, model='openai/gpt-oss-20b', object='chat.completion', system_fingerprint=None, choices=[Choices(finish_reason='stop', index=0, message=Message(content='Hello! How can I help you today?', role='assistant', tool_calls=None, function_call=None, reasoning_content='The user says \"hi\". We need to respond. The instruction: \"You are ChatGPT, a large language model trained by OpenAI.\" There\\'s no special instruction. Just respond politely.', provider_specific_fields={'refusal': None, 'reasoning': 'The user says \"hi\". We need to respond. The instruction: \"You are ChatGPT, a large language model trained by OpenAI.\" There\\'s no special instruction. Just respond politely.', 'reasoning_details': [{'type': 'reasoning.text', 'text': 'The user says \"hi\". We need to respond. The instruction: \"You are ChatGPT, a large language model trained by OpenAI.\" There\\'s no special instruction. Just respond politely.', 'format': 'unknown', 'index': 0}], 'reasoning_content': 'The user says \"hi\". We need to respond. The instruction: \"You are ChatGPT, a large language model trained by OpenAI.\" There\\'s no special instruction. Just respond politely.'}), provider_specific_fields={'native_finish_reason': 'stop'})], usage=Usage(completion_tokens=57, prompt_tokens=70, total_tokens=127, completion_tokens_details=None, prompt_tokens_details=None), service_tier=None, provider='Phala')"
-      ]
-     },
-     "execution_count": null,
-     "metadata": {},
-     "output_type": "execute_result"
-    }
-   ],
+   "outputs": [],
    "source": [
-    "import os, litellm\n",
-    "OPENROUTER_API_KEY = os.getenv(\"OPENROUTER_API_KEY\")\n",
-    "OPENROUTER_BASE_URL = \"https://openrouter.ai/api/v1\"\n",
-    "c = Chat(\"openai/gpt-oss-20b\", api_key=OPENROUTER_API_KEY, api_base=OPENROUTER_BASE_URL)\n",
-    "c(\"hi\")"
+    "api_key = os.getenv(\"OPENROUTER_API_KEY\")\n",
+    "if api_key: Chat(\"openai/gpt-oss-20b\", api_key=api_key, api_base=\"https://openrouter.ai/api/v1\")(\"hi\")"
    ]
   },
   {
@@ -5390,7 +5364,7 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "#| hides\n",
+    "#| hide\n",
     "import nbdev; nbdev.nbdev_export()"
    ]
   },