Datos Enviados por Post

Código

main.py

from fastapi import FastAPI
from pydantic import BaseModel


class User(BaseModel):
    username: str


app = FastAPI()


@app.post("/users/")
def create_user(user: User):
    return user


@app.get("/users/")
def read_users():
    return [{"username": "Rick"}, {"username": "Morty"}]


@app.get("/users/{user_id}")
def read_user(user_id: int):
    return {"id": user_id, "username": "Pickle Rick"}

Servidor

Ejecuta el servidor en vivo:

$ uvicorn main:app --reload

<span style="color: green;">INFO</span>:     Uvicorn running on http://127.0.0.1:8000 (Press CTRL+C to quit)
<span style="color: green;">INFO</span>:     Started reloader process [28720]
<span style="color: green;">INFO</span>:     Started server process [28722]
<span style="color: green;">INFO</span>:     Waiting for application startup.
<span style="color: green;">INFO</span>:     Application startup complete.

Docs del API

Ahora puedes abrir los docs del API en: http://127.0.0.1:8000/docs.