Add fastapi code

venv/lib/python3.11/site-packages/websockets/legacy/compatibility.py

@@ -0,0 +1,13 @@
+from __future__ import annotations
+
+import asyncio
+import sys
+from typing import Any, Dict
+
+
+def loop_if_py_lt_38(loop: asyncio.AbstractEventLoop) -> Dict[str, Any]:
+    """
+    Helper for the removal of the loop argument in Python 3.10.
+
+    """
+    return {"loop": loop} if sys.version_info[:2] < (3, 8) else {}