Fastapi Depends example

app.py

import uuid

from fastapi import FastAPI, Depends

app = FastAPI()


class Session:
    pass


class R1:
    pass


class R2:
    pass


@app.get("/")
async def root(r1: R1 = Depends(), r2: R2 = Depends()):
    return {"message": "Hello World"}


def new_r1(s: Session = Depends()):
    print("r1", s)


def new_r2(s: Session = Depends()):
    print("r2", s)


def new_s():
    return uuid.uuid4()


app.dependency_overrides[Session] = new_s
app.dependency_overrides[R1] = new_r1
app.dependency_overrides[R2] = new_r2