[Python] How to make case insensitive choices using Python's enum and FastAPI?

I have this application:

import enum
from typing import Annotated, Literal

import uvicorn
from fastapi import FastAPI, Query, Depends
from pydantic import BaseModel

app = FastAPI()


class MyEnum(enum.Enum):
ab = "ab"
cd = "cd"


class MyInput(BaseModel):
q: Annotated[MyEnum, Query(...)]


@app.get("/")
def test(inp: MyInput = Depends()):
return "Hello world"


def main():
uvicorn.run("run:app", host="0.0.0.0", reload=True, port=8001)


if __name__ == "__main__":
main()


curl http://127.0.0.1:8001/?q=ab or curl http://127.0.0.1:8001/?q=cd returns "Hello World"

But any of these

• curl http://127.0.0.1:8001/?q=aB
• curl http://127.0.0.1:8001/?q=AB
• curl http://127.0.0.1:8001/?q=Cd
• etc

returns 422Unprocessable Entity which makes sense.

How can I make this validation case insensitive?

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