simple_versioning.py

from fastapi import FastAPI
from fastapi_versioning import VersionedFastAPI, version

app = FastAPI(title="My App")


@app.get("/greet")
@version(1, 0)
def greet_with_hello():
    return "Hello"


@app.get("/greet")
@version(1, 2)
def greet_with_hi():
    return "Hi"

@app.get("/goodbye")
@version(1, 1)
def say_goodbye():
    return “bye”

@app.get("/foo")
def get_foo():
    return “foo”


app = VersionedFastAPI(app, default_api_version=(1, 2))