>>> from fastapi import FastAPI
>>> app = FastAPI()
>>>
>>>
>>> @app.get('/user/active')
... def active():
...     return {'data': 'list all active users'}
>>>
>>>
>>> @app.get('/user/{id}')
... def show_by_id(id: int):
...     return {'data': id}
>>>
>>>
>>> @app.get('/user/{firstname}-{lastname}')
... def show_by_name(firstname: str, lastname: str):
...     return {'data': f'{firstname} {lastname}'}
>>>
>>>
>>> @app.get('/user/{id}/friends')
... def show_friends(id: int):
...     return {'data': 'comments'}

$ uvicorn main:app --reload
INFO:     Uvicorn running on http://127.0.0.1:8000 (Press CTRL+C to quit)
INFO:     Started reloader process [68005] using watchgod
INFO:     Started server process [68007]
INFO:     Waiting for application startup.
INFO:     Application startup complete.