Optional query parameters in FastAPI - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to declare an optional query parameter with a default value.

FastAPI

from fastapi import FastAPI
from typing import [1]

app = FastAPI()

@app.get("/items/")
async def read_items(q: [1][str] = None):
    return {"q": q}

Drag options to blanks, or click blank then click option'

AList

BOptional

CDict

DSet

Attempts:

3 left

💡 Hint

Common Mistakes

Using List or Dict instead of Optional for optional parameters.

Not importing Optional from typing.

The Optional type from typing allows declaring a query parameter that can be None if not provided.

2fill in blank

medium

Complete the code to import the correct function to declare an optional query parameter with a default value.

FastAPI

from fastapi import FastAPI, [1]

app = FastAPI()

@app.get("/users/")
async def get_users(name: str = [1](None)):
    return {"name": name}

Drag options to blanks, or click blank then click option'

AQuery

BDepends

CPath

DBody

Attempts:

3 left

💡 Hint

Common Mistakes

Using Depends or Body instead of Query for query parameters.

Not importing Query from fastapi.

The Query function from FastAPI is used to declare and customize query parameters, including setting default values.

3fill in blank

hard

Fix the error in the code by completing the query parameter declaration to make it optional with a default value.

FastAPI

from fastapi import FastAPI, Query

app = FastAPI()

@app.get("/search/")
async def search_items(q: str = [1]):
    return {"q": q}

Drag options to blanks, or click blank then click option'

AQuery(default=None)

BQuery()

CQuery(None)

DQuery(default="")

Attempts:

3 left

💡 Hint

Common Mistakes

Using Query() without arguments makes the parameter required.

Using default empty string instead of None.

Using Query(None) declares the query parameter as optional with a default value of None.

4fill in blank

hard

Fill both blanks to declare an optional integer query parameter with a default value of 10.

FastAPI

from fastapi import FastAPI, [1]

app = FastAPI()

@app.get("/numbers/")
async def get_number(limit: int = [1]([2])):
    return {"limit": limit}

Drag options to blanks, or click blank then click option'

AQuery

BDepends

C10

DNone

Attempts:

3 left

💡 Hint

Common Mistakes

Using Depends instead of Query.

Using None as default instead of 10.

Use Query to declare the query parameter and set its default value to 10.

5fill in blank

hard

Fill all three blanks to declare an optional string query parameter with a default value and a description.

FastAPI

from fastapi import FastAPI, [1]

app = FastAPI()

@app.get("/products/")
async def list_products(q: str = [2]):
    return {"query": q}

# Use Query with default value "book" and description [3]

Drag options to blanks, or click blank then click option'

AQuery

BQuery("book", description="Search term")

C"Search term"

DQuery(default="book", description="Search term")

Attempts:

3 left

💡 Hint

Common Mistakes

Putting description as a separate string instead of inside Query.

Not using named arguments for default and description.

Import Query, then use it with default value and description to declare the optional query parameter.