FastAPI · question
Q.06 of 46
How do you define path parameters with validation in FastAPI?
← All FastAPI questions
Re-explain
Path parameters are defined in the function signature with type hints:
from fastapi import FastAPI, Path
app = FastAPI()
@app.get("/items/{item_id}")
def get_item(
item_id: int = Path(..., gt=0, description="The ID of the item")
):
return {"item_id": item_id}
@app.get("/users/{user_id}/items/{item_id}")
def get_user_item(user_id: int, item_id: int):
return {"user_id": user_id, "item_id": item_id}
Rewriting in plainer words…
This answer doesn't lend itself to a diagram - it reads best . No credits were charged.
The model's verdict: “”
This answer is explained by a shared concept diagram -
open →
Point the redraw:
How well did you know this?
AI:
Saved in this browser - sign in to keep your review list.
How should your speech become text?
Listening… your words appear above as you speak - tap Stop when you're done.
Recording · cr - tap Stop & transcribe when you're done.
Transcribing with AI…
Voice:
Keep going - a few more words and AI can grade it.
Interview lens
Likely follow-ups, what you can say, and the weak answers to avoid.
Pro · $10/mo
40 of 46 FastAPI answers are gated.
Full answers, code samples, AI explanations - simpler, deeper, or as an interactive diagram. Cancel anytime.
-
Full answers + code
-
AI explain - simpler, deeper, or visualized
-
1,000 AI credits / month
-
Cancel anytime