Add openAI compatible API (#1810)

Co-authored-by: Chayenne <zhaochenyang@g.ucla.edu>

docs/send_request.ipynb

@@ -4,7 +4,9 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "# Quick Start"
+    "# Quick Start: Launch A Server and Send Requests\n",
+    "\n",
+    "This section provides a quick start guide to using SGLang after installation."
    ]
   },
   {
@@ -13,12 +15,13 @@
    "source": [
     "## Launch a server\n",
     "\n",
-    "This code uses `subprocess.Popen` to start an SGLang server process, equivalent to executing \n",
+    "This code block is equivalent to executing \n",
     "\n",
     "```bash\n",
     "python -m sglang.launch_server --model-path meta-llama/Meta-Llama-3.1-8B-Instruct \\\n",
     "--port 30000 --host 0.0.0.0 --log-level warning\n",
     "```\n",
+    "\n",
     "in your command line and wait for the server to be ready."
    ]
   },
@@ -39,10 +42,12 @@
     "from sglang.utils import execute_shell_command, wait_for_server, terminate_process\n",
     "\n",
     "\n",
-    "server_process = execute_shell_command(\"\"\"\n",
+    "server_process = execute_shell_command(\n",
+    "    \"\"\"\n",
     "python -m sglang.launch_server --model-path meta-llama/Meta-Llama-3.1-8B-Instruct \\\n",
     "--port 30000 --host 0.0.0.0 --log-level warning\n",
-    "\"\"\")\n",
+    "\"\"\"\n",
+    ")\n",
     "\n",
     "wait_for_server(\"http://localhost:30000\")\n",
     "print(\"Server is ready. Proceeding with the next steps.\")"
@@ -105,9 +110,7 @@
     "# Always assign an api_key, even if not specified during server initialization.\n",
     "# Setting an API key during server initialization is strongly recommended.\n",
     "\n",
-    "client = openai.Client(\n",
-    "    base_url=\"http://127.0.0.1:30000/v1\", api_key=\"None\"\n",
-    ")\n",
+    "client = openai.Client(base_url=\"http://127.0.0.1:30000/v1\", api_key=\"None\")\n",
     "\n",
     "# Chat completion example\n",
     "\n",