Add fastapi code

venv/lib/python3.11/site-packages/fastapi/exceptions.py

@@ -0,0 +1,37 @@
+from typing import Any, Dict, Optional, Sequence, Type
+
+from pydantic import BaseModel, ValidationError, create_model
+from pydantic.error_wrappers import ErrorList
+from starlette.exceptions import HTTPException as StarletteHTTPException
+from starlette.exceptions import WebSocketException as WebSocketException  # noqa: F401
+
+
+class HTTPException(StarletteHTTPException):
+    def __init__(
+        self,
+        status_code: int,
+        detail: Any = None,
+        headers: Optional[Dict[str, Any]] = None,
+    ) -> None:
+        super().__init__(status_code=status_code, detail=detail, headers=headers)
+
+
+RequestErrorModel: Type[BaseModel] = create_model("Request")
+WebSocketErrorModel: Type[BaseModel] = create_model("WebSocket")
+
+
+class FastAPIError(RuntimeError):
+    """
+    A generic, FastAPI-specific error.
+    """
+
+
+class RequestValidationError(ValidationError):
+    def __init__(self, errors: Sequence[ErrorList], *, body: Any = None) -> None:
+        self.body = body
+        super().__init__(errors, RequestErrorModel)
+
+
+class WebSocketRequestValidationError(ValidationError):
+    def __init__(self, errors: Sequence[ErrorList]) -> None:
+        super().__init__(errors, WebSocketErrorModel)