Why advanced patterns solve real problems in FastAPI - Test Your Understanding

Practice - 5 Tasks

1fill in blank

easy

Complete the code to create a basic FastAPI app instance.

FastAPI

from fastapi import [1]
app = [1]()

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ARequest

BDepends

CResponse

DFastAPI

Attempts:

3 left

💡 Hint

Common Mistakes

Importing Request instead of FastAPI

Using Response to create app

The FastAPI class is used to create the app instance.

2fill in blank

medium

Complete the code to define a GET endpoint that returns a greeting.

FastAPI

@app.[1]("/")
async def read_root():
    return {"message": "Hello World"}

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Aget

Bput

Cpost

Ddelete

Attempts:

3 left

💡 Hint

Common Mistakes

Using post decorator for GET endpoint

Misspelling the decorator name

The @app.get decorator defines a GET HTTP method endpoint.

3fill in blank

hard

Fix the error in the dependency injection by completing the code.

FastAPI

from fastapi import Depends

def common_parameters(q: str = None):
    return {"q": q}

@app.get("/items/")
async def read_items(params: dict = [1](common_parameters)):
    return params

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AResponse

BRequest

CDepends

DBody

Attempts:

3 left

💡 Hint

Common Mistakes

Using Request or Response instead of Depends

Forgetting to import Depends

The Depends function is used to declare dependencies in FastAPI.

4fill in blank

hard

Fill both blanks to create a reusable router and include it in the main app.

FastAPI

from fastapi import APIRouter

router = [1]()

@router.get("/users")
async def get_users():
    return ["Alice", "Bob"]

app.[2](router)

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AAPIRouter

BDepends

Cinclude_router

Dadd_route

Attempts:

3 left

💡 Hint

Common Mistakes

Using Depends instead of APIRouter

Using add_route instead of include_router

APIRouter() creates a router instance. app.include_router() adds it to the main app.

5fill in blank

hard

Fill all three blanks to create a Pydantic model, use it in a POST endpoint, and return the data.

FastAPI

from pydantic import BaseModel
from fastapi import FastAPI

app = FastAPI()

class Item([1]):
    name: str
    price: float

@app.post("/items/")
async def create_item(item: [2]):
    return {"item_name": item.[3]

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ABaseModel

BItem

Cname

DFastAPI

Attempts:

3 left

💡 Hint

Common Mistakes

Using FastAPI instead of BaseModel

Returning item.price instead of item.name

The model class inherits from BaseModel. The endpoint parameter uses the model Item. The returned value accesses the name attribute.